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annotate general/numerical/scalar/erfp.m @ 61:eff6bddf82e3 tip

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Finally implemented perceptual brightness thing.
author samer
date Sun, 11 Oct 2015 10:20:42 +0100
parents db7f4afd27c5
children
rev   line source
samer@4 1 function y=erfp(x)
samer@4 2 % erfp - returns Pr(X>x) for a normalised Gaussian random variable
samer@4 3 %
samer@4 4 % erfp :: X:real -> Z:real.
samer@4 5 %
samer@4 6 % Y = integeral from X to infinity of
samer@4 7 % (1/sqrt(2*pi)) * exp(-0.5*t.^2)
samer@4 8
samer@4 9 y = erfc(x/sqrt(2))/2;