/usr/share/psychtoolbox-3/PsychProbability/NormalCumulative.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 | function prob = NormalCumulative(x,u,var)
% function prob = NormalCumulative(x,u,var)
%
% Compute the probability that a draw from a N(u,var) distribution is less
% than x.
%
% 6/25/96 dhb Fixed for new erf convention.
% 7/24/04 awi Cosmetic
[m,n] = size(x);
z = (x - u*ones(m,n))/sqrt(var);
prob = 0.5 + erf(z/sqrt(2))/2;
|