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annotate plotData.m @ 6:141d81a2acf5 default tip

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Remove usage of sum function in cost function (thanks Jeroen Willems)
author Jordi Gutiérrez Hermoso <jordigh@octave.org>
date Tue, 08 Nov 2011 03:30:56 -0500
parents a4c4da8f4ac0
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1 function plotData(X, y)
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2 ##PLOTDATA Plots the data points X and y into a new figure
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3 ## PLOTDATA(x,y) plots the data points with + for the positive examples
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4 ## and o for the negative examples. X is assumed to be a Mx2 matrix.
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6 ## Create New Figure
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7 figure; hold on;
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9 ## Find Indices of Positive and Negative Examples
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10 pos = find(y==1); neg = find(y == 0);
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11 ## Plot Examples
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12 plot (X(pos, 1), X(pos, 2), "k+","LineWidth", 2,
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13 "MarkerSize", 7);
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14 plot (X(neg, 1), X(neg, 2), "ko", "MarkerFaceColor",
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15 "y", "MarkerSize", 7);
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17 hold off;
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19 endfunction