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function rect = RectOfMatrix(mat)
% rect = RectOfMatrix(mat)
%
% Accept an image as a matrix and return a Psychtoolbox rect specifying
% the bounds.
%
% See also SetRect, PsychRects
% HISTORY
% 6/28/04 awi Wrote it.
% 7/13/04 awi Improved documentation.
% 1/29/05 dgp Renamed from RectFromMatrix to RectOfMatrix.
% 1/29/05 dgp Timed it. RectOfMatrix is quick, taking about 100 us,
% independent of matrix size.
% 11/24/05 mk Bugfix. Didn't work for multi-layer (3D) matrices.
[m,n,d]=size(mat);
rect=[0 0 n m];
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