Message-ID: <19565286.post@talk.nabble.com>
Date: 2008-09-19T02:33:32Z
From: sandsky
Subject: Error: function cannot be evaluated at initial parameters
I have an error for a simple optimization problem. Is there anyone knowing
about this error?
lambda1=-9
lambda2=-6
L<-function(a){
s2i2f<-(exp(-lambda1*(250^a)-lambda2*(275^a-250^a))
-exp(-lambda1*(250^a)-lambda2*(300^a-250^a)))
logl<-log(s2i2f)
return(-logl)}
optim(1,L)
Error in optim(1, L) : function cannot be evaluated at initial parameters
Thank you in advance
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