Hi everyone, I'm having some trouble with my code to using PROC NLIN. I try to fit ODR by year with Gamma distribution. When I run the code, I keep getting the error " WARNING: Maximum number of iterations exceeded. WARNING: PROC NLIN failed to converge." Here are my data and code. Thank you so much! %macro gamma_fit();
proc nlin data= my_data (where=(_leaf_ = "01"))
maxiter=100 method=marquardt converge=0.0000001;
parameters alpha = 0 to 10 by 5 beta = 0 to 10 by 5 lambda = 0 to 1;
model ODR = pdf("gamma",year,alpha,beta)*lambda;
output out=nlinout predicted=pred parms=alpha beta lambda;
run;
%mend;
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