File: ExcitationToContrast.m

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psychtoolbox-3 3.0.14.20170103%2Bgit6-g605ff5c.dfsg1-1
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function contrast = ExcitationToContrast(excitation,reference)
% contrast = ExcitationToContrast(excitation,reference)
%
% Convert excitation coordinates to contrast coordinates.
%
% 4/5/02   dhb, ly   Wrote it.

[m,n] = size(excitation);
contrast = (excitation-reference(:,ones(1,n))) ./ reference(:,ones(1,n));