[R] A warning message when using mix package.

From: Li, Jia <LI_at_nsabp.pitt.edu>
Date: Wed 20 Jul 2005 - 06:37:20 EST

Dear all,

I just start using package mix in R and am inexperienced with it. When I ran my program several times, I sometimes got the warning message, and sometimes not :

Warning message:

Loglik converged before variable 2 ; beta may be infinite. in: fitter(X, Y, strats, offset, init, control, weights = weights,

I cannot find what is wrong with my program. Does anyone have an idea with it and whether this would affect my results? Any help would be appreciated.


By the way, I copy a part of my program and hope it would help,

beta <- c(0, 0,0,0,0) # 'True' coefficients

#------------make a matrix of covariates-----------------------#



#----------------------------run MI------------------------------#



rngseed(1234567) # set random number generator seed

for (i in 1:10){

thetahat <- em.mix(s)

newtheta <- da.mix(s, thetahat, steps=2000, showits=TRUE)

MI[[i]] <- imp.mix(s, newtheta)


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