/usr/share/psychtoolbox-3/PsychSignal/MatMax.m is in psychtoolbox-3-common 3.0.11.20140816.dfsg1-1.
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1 2 3 4 5 6 7 | function [maxval] = MatMax(image)
% [maxval] = MatMax(image)
% Find the maximum value in a matrix.
% 6/13/12 dn Generalize to N-D input by forwarding to MaxAll()
maxval = MaxAll(image);
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