Mercurial > octave-antonio
view scripts/image/gray.m @ 17170:d6499c14021c
doc: Periodic grammarcheck of documentation.
* doc/interpreter/basics.txi, doc/interpreter/expr.txi,
doc/interpreter/install.txi, doc/interpreter/java.txi,
doc/interpreter/plot.txi, doc/interpreter/sparse.txi,
doc/interpreter/vectorize.txi, libinterp/corefcn/cellfun.cc,
libinterp/corefcn/debug.cc, libinterp/corefcn/file-io.cc,
libinterp/corefcn/load-save.cc, libinterp/corefcn/matrix_type.cc,
libinterp/corefcn/pr-output.cc, libinterp/parse-tree/oct-parse.in.yy,
liboctave/numeric/LSODE-opts.in, scripts/image/imformats.m,
scripts/image/imread.m, scripts/image/imwrite.m,
scripts/miscellaneous/error_ids.m, scripts/miscellaneous/fileattrib.m,
scripts/miscellaneous/mex.m, scripts/miscellaneous/mkoctfile.m,
scripts/miscellaneous/warning_ids.m, scripts/prefs/prefdir.m,
scripts/prefs/preferences.m, scripts/signal/fftfilt.m,
scripts/strings/isstrprop.m, scripts/testfun/assert.m:
Periodic grammarcheck of documentation.
author | Rik <rik@octave.org> |
---|---|
date | Sun, 04 Aug 2013 13:08:39 -0700 |
parents | 1a800034d443 |
children | d63878346099 |
line wrap: on
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## Copyright (C) 1994-2012 John W. Eaton ## ## This file is part of Octave. ## ## Octave is free software; you can redistribute it and/or modify it ## under the terms of the GNU General Public License as published by ## the Free Software Foundation; either version 3 of the License, or (at ## your option) any later version. ## ## Octave is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ## General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with Octave; see the file COPYING. If not, see ## <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {Function File} {@var{map} =} gray () ## @deftypefnx {Function File} {@var{map} =} gray (@var{n}) ## Create gray colormap. This colormap varies from black to white with ## shades of gray. ## The argument @var{n} must be a scalar. ## If unspecified, the length of the current colormap, or 64, is used. ## @seealso{colormap} ## @end deftypefn ## Author: Tony Richardson <arichard@stark.cc.oh.us> ## Created: July 1994 ## Adapted-By: jwe ## PKG_ADD: colormap ("register", "gray"); ## PKG_DEL: colormap ("unregister", "gray"); function map = gray (n) if (nargin == 0) n = rows (colormap); elseif (nargin == 1) if (! isscalar (n)) error ("gray: N must be a scalar"); endif else print_usage (); endif if (n == 1) map = [0, 0, 0]; elseif (n > 1) gr = [0:(n-1)]' / (n - 1); map = [gr, gr, gr]; else map = zeros (0, 3); endif endfunction %!demo %! ## Show the 'gray' colormap as an image %! image (1:64, linspace (0, 1, 64), repmat ((1:64)', 1, 64)); %! axis ([1, 64, 0, 1], "ticy", "xy"); %! colormap (gray (64));