Mercurial > hg > octave-image
annotate flag.m @ 136:78b9878c50f0 Octave-Forge-2004.11.16
Add new functions
| author | pkienzle |
|---|---|
| date | Tue, 16 Nov 2004 09:18:23 +0000 |
| parents | 2adef77b98d0 |
| children |
| rev | line source |
|---|---|
| 0 | 1 ## Copyright (C) 1999,2000 Kai Habel |
| 2 ## | |
| 3 ## This program is free software; you can redistribute it and/or modify | |
| 4 ## it under the terms of the GNU General Public License as published by | |
| 5 ## the Free Software Foundation; either version 2 of the License, or | |
| 6 ## (at your option) any later version. | |
| 7 ## | |
| 8 ## This program is distributed in the hope that it will be useful, | |
| 9 ## but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 11 ## GNU General Public License for more details. | |
| 12 ## | |
| 13 ## You should have received a copy of the GNU General Public License | |
| 14 ## along with this program; if not, write to the Free Software | |
| 15 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 16 | |
| 17 ## -*- texinfo -*- | |
| 18 ## @deftypefn {Function File} {} flag (@var{n}) | |
| 19 ## Create color colormap. | |
| 20 ## (cycling through red, white, blue and black) | |
| 21 ## The argument @var{n} should be a scalar. If it | |
| 22 ## is omitted, the length of the current colormap or 64 is assumed. | |
| 23 ## @end deftypefn | |
| 24 ## @seealso{colormap} | |
| 25 | |
| 26 ## Author: Kai Habel <kai.habel@gmx.de> | |
| 27 | |
| 28 ## flag(number) gives a colormap consists of red, white, blue and black | |
| 29 ## changing with each index | |
| 30 | |
| 31 function map = flag (number) | |
| 32 | |
| 33 if (nargin == 0) | |
|
40
2adef77b98d0
Remove reference to global variable __current_colormap__; we need to do
pkienzle
parents:
0
diff
changeset
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34 number = rows (colormap); |
| 0 | 35 elseif (nargin == 1) |
| 36 if (! is_scalar (number)) | |
| 37 error ("flag: argument must be a scalar"); | |
| 38 endif | |
| 39 else | |
| 40 usage ("flag (number)"); | |
| 41 endif | |
| 42 | |
| 43 p = [1, 0, 0; 1, 1, 1; 0, 0, 1; 0, 0, 0]; | |
| 44 if (rem(number,4) == 0) | |
| 45 map=kron (ones (number / 4, 1), p); | |
| 46 else | |
| 47 map=[kron(ones (fix (number / 4), 1), p); p(1:rem (number, 4), :)]; | |
| 48 endif | |
| 49 | |
| 50 endfunction |