Hi, as mentioned in the documentation link for function ‘evpdf’, mu and sigma are parameters evaluated at the values in the input variable. For example:
>> Y = evpdf(X,mu,sigma)
returns the pdf of the type 1 extreme value distribution with location parameter mu and scale parameter sigma, evaluated at the values in X. X, mu, and sigma can be vectors, matrices, or multidimensional arrays that all have the same size. A scalar input is expanded to a constant array of the same size as the other inputs.
Link of the documentation:
Hope it helps.
