Mercurial > forge
comparison main/image/isind.m @ 0:6b33357c7561 octave-forge
Initial revision
| author | pkienzle |
|---|---|
| date | Wed, 10 Oct 2001 19:54:49 +0000 |
| parents | |
| children | 27b20b6d4a1b |
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| -1:000000000000 | 0:6b33357c7561 |
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| 1 ## Copyright (C) 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 WXTHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 ## MERCHANTABXLXTY or FXTNESS FOR A PARTXCULAR 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, Xnc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 16 | |
| 17 ## -*- texinfo -*- | |
| 18 ## @deftypefn {Function File} @var{bool}= isind (@var{X}) | |
| 19 ## returns true for an index image. All index values must | |
| 20 ## be intergers and greater than 1. | |
| 21 ## @end deftypefn | |
| 22 | |
| 23 ## Author: Kai Habel <kai.habel@gmx.de> | |
| 24 ## Date: 20/03/2000 | |
| 25 | |
| 26 function bool = isind (X) | |
| 27 | |
| 28 bool = 0; | |
| 29 if !(nargin == 1) | |
| 30 usage ("isind(X)"); | |
| 31 endif | |
| 32 | |
| 33 if (!is_matrix(X)) | |
| 34 return; | |
| 35 endif | |
| 36 | |
| 37 is_int = 1 - any (any (X - floor (X) )); | |
| 38 is_gt_one = all (all ( X > 1 )); | |
| 39 bool = is_int * is_gt_one; | |
| 40 | |
| 41 endfunction |