/usr/share/freemat/toolbox/graph/imagesc.m is in freemat-data 4.0-5.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | % IMAGESC IMAGESC Image Display Function
%
% Usage
%
% The imagesc command has the following general syntax
%
% handle = imagesc(x,y,C,clim)
%
% where x is a two vector containing the x coordinates
% of the first and last pixels along a column, and y is a
% two vector containing the y coordinates of the first and
% last pixels along a row. The matrix C constitutes the
% image data. It must either be a scalar matrix, in which case
% the image is colormapped using the colormap for the current
% figure. If the matrix is M x N x 3, then C is intepreted
% as RGB data, and the image is not colormapped. The clim
% argument is a pairs [low high] that specifies scaling. You can
% also omit the x and y,
%
% handle = imagesc(C, clim)
%
% in which case they default to x = [1,size(C,2)] and
% y = [1,size(C,1)]. Finally, you can use the image function
% with only formal arguments
%
% handle = imagesc(properties...)
%
%
% Copyright (c) 2002-2007 Samit Basu, Eugene Ingerman
% Licensed under the GPL
function ohandle = imagesc(varargin)
ax = newplot;
if (length(varargin) == 0), return; end
lim=[];
if( (nargin==2) || (nargin==4) )
if ( (length( varargin{end} ) == 2) && varargin{end}(1)<=varargin{end}(2) ) %last element - limits
lim=varargin{end};
varargin{end}=[];
nargin=nargin-1;
end
end
switch(nargin)
case 1
handle = image(varargin{1},'cdatamapping','scaled');
case 3
handle = image(varargin{:},'cdatamapping','scaled');
otherwise
error('Unrecognized form of image command');
end
if ~isempty(lim),
clim(lim);
end
if (nargout > 0)
ohandle = handle;
end
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