Dear R users,
Please help me on using "mix" function under package "mixdist".
My data distribution shows there are two components for the mixture
distribution: left part is an exponential and right part is a normal. So I plan
to use "gamma" mixture distribution to estimate the parameters. Here is what I
am using for the "mix" function.
Test<-mix(x, mixparam(mu=c(1,125),sigma=c(1,11.18)),"gamma")
However, one error message shows up as:
"Error in nlm(function(x) f(x, ...), p, hessian, typsize, fscale, msg, :
missing value in parameter"
Does anybody know what that means and how to fix it to get the estimation? Your
help will be much appreciated.
Yun
==============================================
Yun Wang
Research Assistant
Department of Family Medicine and Public Health Sciences
Wayne State University School of Medicine
177 Shiffman Library
4325 Brush
Detroit, MI 48201
Phone: 313-577-0707
Fax: 313-577-1773
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