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view general/numerical/scalar/erfratio.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
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function y=erfratio(x)
% erfratio - returns gausspdf(x)./erfp(x) but using a better computation
%
% erfratio :: real -> nonneg.
y = 2./(sqrt(2*pi)*erfcx(x/sqrt(2)));