How can I create this Cumulative Normal (Gaussian) Psychometric Function?

I am trying to create a function for the above, but this gives me errors.

function [a] = cumGaussPF(x,beta,alpha)

fx = @(x,beta,alpha) exp(-0.5*((x-alpha)/beta).^2);

pf = 1/(beta*sqrt(2*pi))*integral(@(x) fx(x,beta,alpha),-inf,x);

end

Answer 1

[Torsten]

pf = normcdf(x,alpha,beta)

[Hossana Twinomurinzi]

Thanks, after seeing your answer - I saw that this is exactly what I am trying to do. Thanks a great deal.

[Torsten]

normcdf is a function from the Statistics and Machine Learning Toolbox.

If your code should not depend on a licence for this toolbox, you can also use

pf = 0.5*(1 + erf((x-alpha)/(sqrt(2)*beta)))

[Hossana Twinomurinzi]

Thanks Torsten