/usr/share/psychtoolbox-3/PsychGamma/MakeGammaMonotonic.m is in psychtoolbox-3-common 3.0.11.20140816.dfsg1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | function output = MakeGammaMonotonic(input)
% output = MakeGammaMonotonic(input)
%
% Make input monotonically increasing from lowest value.
%
% This version also forces the last value to be 1, and then
% enforces decreasing downwards from there, after the
% enforcement of increasing from 0.
%
% 3/1/99 dhb Handle multiple columns.
% 8/03/07 dhb Old routine just enforced non-decreasing. Fixed to make strictly increasing.
% 3/07/10 dhb Wrote from MakeMonotonic.
% Did not want to change behavior of MakeMonotonic in case it is called from
% programs unrelated to gamma fitting.
% 3/08/10 dhb Actually do the enforcement of 1.
% 5/27/10 dhb Use a larger bump, 100*eps
[m,n] = size(input);
output = input;
for j = 1:n
for i = 1:m-1
if (output(i,j) >= output(i+1,j))
output(i+1,j) = output(i,j)+100*eps;
end
end
output(m,j) = 1;
for i = m:-1:2
if (output(i,j) <= output(i-1,j))
output(i-1,j) = output(i,j)-100*eps;
end
end
end
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