/usr/share/psychtoolbox-3/PsychCal/UpdateAmbientSensor.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 37 38 | function cal = UpdateAmbientSensor(cal,new_ambient_sensor,ADD)
% cal = UpdateAmbientSensor(cal,new_ambient_sensor,[ADD])
%
% Update the ambient light used in the conversions. The
% value for new_ambient_sensor should be passed in the
% same units as defined by T_sensor in the call to
% SetColorSpace.
%
%ÊIf flag ADD is true, passed ambient is added to current
% value. Otherwise passed value replaces current value.
% ADD is false if not passed. Use caution when setting ADD
% true -- if the ambient is changing during the experiment
% you typically don't want to keep adding multiple times.
%
% If instead you want to update in the measurement units,
% call UpdateAmbient instead.
%
% 7/7/98 dhb Wrote it.
% 4/5/02 dhb, ly Update for new interface. Internal names not changed.
% 5/2/02 dhb, kr Add ADD flag.
% Primitive dimension check
if (size(new_ambient_sensor,1) ~= size(cal.ambient_linear,1) || ...
size(new_ambient_sensor,2) ~= size(cal.ambient_linear,2) )
error('Old and new ambient specifications are not of same dimension');
end
% Set default on optional argument.
if (nargin < 3 || isempty(ADD))
ADD = 0;
end
% Update the structure
if (~ADD)
cal.ambient_linear = new_ambient_sensor;
else
cal.ambient_linear = cal.ambient_linear + new_ambient_sensor;
end
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