This file is indexed.

/usr/share/psychtoolbox-3/PsychOneliners/MakeCosImage.m is in psychtoolbox-3-common 3.0.11.20131230.dfsg1-1build1.

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
function [image] = MakeCosImage(freqi,freqj,nRowPixels,nColPixels)
% [image] = MakeCosImage(freqi,freqj,nRowPixels,[nColPixels])
%
% Computes a two-dimensional cosine function image.
%
% The image has dimensions nRowPixels by nColPixels.
% If nColPixels is omitted, a square image is returned.
%
% 8/15/94		dhb		Both row and column dimensions used if passed.

% Set column pixels for square image if it wasn't passed.
if (nargin <= 3)
	nColPixels = nRowPixels;
end

x = 1:nColPixels;
y = 1:nRowPixels;
usefreqi = 2*pi*freqi/nRowPixels;
usefreqj = 2*pi*freqj/nColPixels;
cosx = cos(usefreqj*x);
cosy = cos(usefreqi*y);
image = cosy'*cosx;