machine-learning-hw5: submitWeb.m annotate

annotate submitWeb.m @ 5:eddd33e57f6a default tip

Justify loop in trainLinearReg

author	Jordi Gutiérrez Hermoso <jordigh@octave.org>
date	Sun, 27 Nov 2011 15:58:14 -0500
parents	0f14514e907f
children

rev	line source
0 0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	1 function submitWeb(partId)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	2 %SUBMITWEB Generates a base64 encoded string for web-based submissions
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	3 % SUBMITWEB() will generate a base64 encoded string so that you can submit your
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	4 % solutions via a web form
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	5
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	6 fprintf('==\n== [ml-class] Submitting Solutions \| Programming Exercise %s\n==\n', ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	7 homework_id());
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	8 if ~exist('partId', 'var') \|\| isempty(partId)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	9 partId = promptPart();
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	10 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	11
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	12 % Check valid partId
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	13 partNames = validParts();
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	14 if ~isValidPartId(partId)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	15 fprintf('!! Invalid homework part selected.\n');
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	16 fprintf('!! Expected an integer from 1 to %d.\n', numel(partNames));
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	17 fprintf('!! Submission Cancelled\n');
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	18 return
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	19 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	20
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	21 [login] = loginPrompt();
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	22 if isempty(login)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	23 fprintf('!! Submission Cancelled\n');
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	24 return
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	25 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	26
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	27 [result] = submitSolution(login, partId, output(partId), ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	28 source(partId));
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	29 result = base64encode(result);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	30
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	31 fprintf('\nSave as submission file [submit_ex%s_part%d.txt]: ', ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	32 homework_id(), partId);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	33 saveAsFile = input('', 's');
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	34 if (isempty(saveAsFile))
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	35 saveAsFile = sprintf('submit_ex%s_part%d.txt', homework_id(), partId);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	36 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	37
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	38 fid = fopen(saveAsFile, 'w');
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	39 if (fid)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	40 fwrite(fid, result);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	41 fclose(fid);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	42 fprintf('\nSaved your solutions to %s.\n\n', saveAsFile);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	43 fprintf(['You can now submit your solutions through the web \n' ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	44 'form in the programming exercises. Select the corresponding \n' ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	45 'programming exercise to access the form.\n']);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	46
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	47 else
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	48 fprintf('Unable to save to %s\n\n', saveAsFile);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	49 fprintf(['You can create a submission file by saving the \n' ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	50 'following text in a file: (press enter to continue)\n\n']);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	51 pause;
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	52 fprintf(result);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	53 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	54
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	55 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	56
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	57 % ================== CONFIGURABLES FOR EACH HOMEWORK ==================
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	58
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	59 function id = homework_id()
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	60 id = '5';
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	61 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	62
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	63 function [partNames] = validParts()
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	64 partNames = { 'Regularized Linear Regression Cost Function', ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	65 'Regularized Linear Regression Gradient', ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	66 'Learning Curve', ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	67 'Polynomial Feature Mapping' ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	68 'Validation Curve' ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	69 };
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	70 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	71
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	72 function srcs = sources()
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	73 % Separated by part
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	74 srcs = { { 'linearRegCostFunction.m' }, ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	75 { 'linearRegCostFunction.m' }, ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	76 { 'learningCurve.m' }, ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	77 { 'polyFeatures.m' }, ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	78 { 'validationCurve.m' } };
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	79 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	80
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	81 function out = output(partId)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	82 % Random Test Cases
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	83 X = [ones(10,1) sin(1:1.5:15)' cos(1:1.5:15)'];
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	84 y = sin(1:3:30)';
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	85 Xval = [ones(10,1) sin(0:1.5:14)' cos(0:1.5:14)'];
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	86 yval = sin(1:10)';
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	87 if partId == 1
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	88 [J] = linearRegCostFunction(X, y, [0.1 0.2 0.3]', 0.5);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	89 out = sprintf('%0.5f ', J);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	90 elseif partId == 2
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	91 [J, grad] = linearRegCostFunction(X, y, [0.1 0.2 0.3]', 0.5);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	92 out = sprintf('%0.5f ', grad);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	93 elseif partId == 3
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	94 [error_train, error_val] = ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	95 learningCurve(X, y, Xval, yval, 1);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	96 out = sprintf('%0.5f ', [error_train(:); error_val(:)]);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	97 elseif partId == 4
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	98 [X_poly] = polyFeatures(X(2,:)', 8);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	99 out = sprintf('%0.5f ', X_poly);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	100 elseif partId == 5
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	101 [lambda_vec, error_train, error_val] = ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	102 validationCurve(X, y, Xval, yval);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	103 out = sprintf('%0.5f ', ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	104 [lambda_vec(:); error_train(:); error_val(:)]);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	105 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	106 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	107
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	108 % ========================= SUBMIT HELPERS =========================
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	109
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	110 function src = source(partId)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	111 src = '';
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	112 src_files = sources();
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	113 if partId <= numel(src_files)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	114 flist = src_files{partId};
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	115 for i = 1:numel(flist)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	116 fid = fopen(flist{i});
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	117 while ~feof(fid)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	118 line = fgets(fid);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	119 src = [src line];
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	120 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	121 fclose(fid);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	122 src = [src '\|\|\|\|\|\|\|\|'];
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	123 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	124 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	125 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	126
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	127 function ret = isValidPartId(partId)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	128 partNames = validParts();
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	129 ret = (~isempty(partId)) && (partId >= 1) && (partId <= numel(partNames));
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	130 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	131
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	132 function partId = promptPart()
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	133 fprintf('== Select which part(s) to submit:\n', ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	134 homework_id());
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	135 partNames = validParts();
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	136 srcFiles = sources();
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	137 for i = 1:numel(partNames)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	138 fprintf('== %d) %s [', i, partNames{i});
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	139 fprintf(' %s ', srcFiles{i}{:});
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	140 fprintf(']\n');
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	141 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	142 fprintf('\nEnter your choice [1-%d]: ', ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	143 numel(partNames));
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	144 selPart = input('', 's');
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	145 partId = str2num(selPart);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	146 if ~isValidPartId(partId)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	147 partId = -1;
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	148 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	149 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	150
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	151
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	152 function [result, str] = submitSolution(email, part, output, source)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	153
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	154 result = ['a:5:{' ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	155 p_s('homework') p_s64(homework_id()) ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	156 p_s('part') p_s64(part) ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	157 p_s('email') p_s64(email) ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	158 p_s('output') p_s64(output) ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	159 p_s('source') p_s64(source) ...
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	160 '}'];
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	161
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	162 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	163
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	164 function s = p_s(str)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	165 s = ['s:' num2str(numel(str)) ':"' str '";'];
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	166 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	167
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	168 function s = p_s64(str)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	169 str = base64encode(str, '');
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	170 s = ['s:' num2str(numel(str)) ':"' str '";'];
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	171 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	172
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	173 % =========================== LOGIN HELPERS ===========================
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	174
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	175 function [login] = loginPrompt()
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	176 % Prompt for password
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	177 [login] = basicPrompt();
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	178 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	179
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	180
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	181 function [login] = basicPrompt()
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	182 login = input('Login (Email address): ', 's');
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	183 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	184
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	185
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	186 % =========================== Base64 Encoder ============================
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	187 % Thanks to Peter John Acklam
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	188 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	189
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	190 function y = base64encode(x, eol)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	191 %BASE64ENCODE Perform base64 encoding on a string.
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	192 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	193 % BASE64ENCODE(STR, EOL) encode the given string STR. EOL is the line ending
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	194 % sequence to use; it is optional and defaults to '\n' (ASCII decimal 10).
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	195 % The returned encoded string is broken into lines of no more than 76
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	196 % characters each, and each line will end with EOL unless it is empty. Let
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	197 % EOL be empty if you do not want the encoded string broken into lines.
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	198 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	199 % STR and EOL don't have to be strings (i.e., char arrays). The only
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	200 % requirement is that they are vectors containing values in the range 0-255.
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	201 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	202 % This function may be used to encode strings into the Base64 encoding
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	203 % specified in RFC 2045 - MIME (Multipurpose Internet Mail Extensions). The
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	204 % Base64 encoding is designed to represent arbitrary sequences of octets in a
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	205 % form that need not be humanly readable. A 65-character subset
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	206 % ([A-Za-z0-9+/=]) of US-ASCII is used, enabling 6 bits to be represented per
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	207 % printable character.
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	208 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	209 % Examples
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	210 % --------
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	211 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	212 % If you want to encode a large file, you should encode it in chunks that are
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	213 % a multiple of 57 bytes. This ensures that the base64 lines line up and
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	214 % that you do not end up with padding in the middle. 57 bytes of data fills
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	215 % one complete base64 line (76 == 57*4/3):
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	216 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	217 % If ifid and ofid are two file identifiers opened for reading and writing,
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	218 % respectively, then you can base64 encode the data with
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	219 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	220 % while ~feof(ifid)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	221 % fwrite(ofid, base64encode(fread(ifid, 60*57)));
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	222 % end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	223 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	224 % or, if you have enough memory,
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	225 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	226 % fwrite(ofid, base64encode(fread(ifid)));
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	227 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	228 % See also BASE64DECODE.
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	229
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	230 % Author: Peter John Acklam
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	231 % Time-stamp: 2004-02-03 21:36:56 +0100
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	232 % E-mail: pjacklam@online.no
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	233 % URL: http://home.online.no/~pjacklam
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	234
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	235 if isnumeric(x)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	236 x = num2str(x);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	237 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	238
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	239 % make sure we have the EOL value
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	240 if nargin < 2
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	241 eol = sprintf('\n');
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	242 else
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	243 if sum(size(eol) > 1) > 1
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	244 error('EOL must be a vector.');
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	245 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	246 if any(eol(:) > 255)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	247 error('EOL can not contain values larger than 255.');
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	248 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	249 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	250
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	251 if sum(size(x) > 1) > 1
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	252 error('STR must be a vector.');
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	253 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	254
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	255 x = uint8(x);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	256 eol = uint8(eol);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	257
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	258 ndbytes = length(x); % number of decoded bytes
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	259 nchunks = ceil(ndbytes / 3); % number of chunks/groups
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	260 nebytes = 4 * nchunks; % number of encoded bytes
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	261
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	262 % add padding if necessary, to make the length of x a multiple of 3
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	263 if rem(ndbytes, 3)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	264 x(end+1 : 3*nchunks) = 0;
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	265 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	266
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	267 x = reshape(x, [3, nchunks]); % reshape the data
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	268 y = repmat(uint8(0), 4, nchunks); % for the encoded data
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	269
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	270 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	271 % Split up every 3 bytes into 4 pieces
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	272 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	273 % aaaaaabb bbbbcccc ccdddddd
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	274 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	275 % to form
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	276 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	277 % 00aaaaaa 00bbbbbb 00cccccc 00dddddd
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	278 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	279 y(1,:) = bitshift(x(1,:), -2); % 6 highest bits of x(1,:)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	280
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	281 y(2,:) = bitshift(bitand(x(1,:), 3), 4); % 2 lowest bits of x(1,:)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	282 y(2,:) = bitor(y(2,:), bitshift(x(2,:), -4)); % 4 highest bits of x(2,:)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	283
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	284 y(3,:) = bitshift(bitand(x(2,:), 15), 2); % 4 lowest bits of x(2,:)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	285 y(3,:) = bitor(y(3,:), bitshift(x(3,:), -6)); % 2 highest bits of x(3,:)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	286
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	287 y(4,:) = bitand(x(3,:), 63); % 6 lowest bits of x(3,:)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	288
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	289 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	290 % Now perform the following mapping
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	291 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	292 % 0 - 25 -> A-Z
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	293 % 26 - 51 -> a-z
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	294 % 52 - 61 -> 0-9
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	295 % 62 -> +
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	296 % 63 -> /
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	297 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	298 % We could use a mapping vector like
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	299 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	300 % ['A':'Z', 'a':'z', '0':'9', '+/']
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	301 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	302 % but that would require an index vector of class double.
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	303 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	304 z = repmat(uint8(0), size(y));
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	305 i = y <= 25; z(i) = 'A' + double(y(i));
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	306 i = 26 <= y & y <= 51; z(i) = 'a' - 26 + double(y(i));
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	307 i = 52 <= y & y <= 61; z(i) = '0' - 52 + double(y(i));
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	308 i = y == 62; z(i) = '+';
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	309 i = y == 63; z(i) = '/';
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	310 y = z;
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	311
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	312 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	313 % Add padding if necessary.
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	314 %
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	315 npbytes = 3 * nchunks - ndbytes; % number of padding bytes
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	316 if npbytes
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	317 y(end-npbytes+1 : end) = '='; % '=' is used for padding
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	318 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	319
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	320 if isempty(eol)
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	321
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	322 % reshape to a row vector
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	323 y = reshape(y, [1, nebytes]);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	324
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	325 else
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	326
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	327 nlines = ceil(nebytes / 76); % number of lines
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	328 neolbytes = length(eol); % number of bytes in eol string
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	329
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	330 % pad data so it becomes a multiple of 76 elements
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	331 y = [y(:) ; zeros(76 * nlines - numel(y), 1)];
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	332 y(nebytes + 1 : 76 * nlines) = 0;
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	333 y = reshape(y, 76, nlines);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	334
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	335 % insert eol strings
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	336 eol = eol(:);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	337 y(end + 1 : end + neolbytes, :) = eol(:, ones(1, nlines));
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	338
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	339 % remove padding, but keep the last eol string
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	340 m = nebytes + neolbytes * (nlines - 1);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	341 n = (76+neolbytes)*nlines - neolbytes;
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	342 y(m+1 : n) = '';
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	343
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	344 % extract and reshape to row vector
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	345 y = reshape(y, 1, m+neolbytes);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	346
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	347 end
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	348
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	349 % output is a character array
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	350 y = char(y);
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	351
0f14514e907f initial commit Jordi Gutiérrez Hermoso <jordigh@octave.org> parents: diff changeset	352 end

Mercurial > hg > machine-learning-hw5

annotate submitWeb.m @ 5:eddd33e57f6a default tip