/usr/share/psychtoolbox-3/PsychRadiometric/TrolandsToPower.m is in psychtoolbox-3-common 3.0.11.20140816.dfsg1-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 | function power = TrolandsToPower(wl,trolands,S_vLambda,vLambda)
% power = TrolandsToPower(wl,trolands,S_vLambda,vLambda)
%
% Convert from photopic trolands to power (watts/degree-2)
% for a monochromatic light.
%
% See W&S, p. 103.
%
% 8/15/96 dhb, abp Wrote the header.
wls_vLambda = MakeItWls(S_vLambda);
index = find(wl == wls_vLambda);
power = trolands/(vLambda(index)*2.242e12);
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