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bcows
2007 Jul 07
0
Error Coefficient matrix not invertible using nlme correlation
...w to fix this problem.
> bcows1.nlme<-nlme(Temp~model(newTime, beta, delta, kappa), data=
bcows.group,
+ fixed=beta+delta+kappa~1,
+ random=beta+delta+kappa~1,
+ start=list(fixed=c(coef(bcows.nls)[1], coef(bcows.nls)[2],
coef(bcows.nls)[3])))
> bcows2.nlme<-update(bcows1.nlme, correlation=corARMA(p=2))
Error in "coef<-.corARMA"(`*tmp*`, value = c(210.907034244201,
197.591708911204 :
Coefficient matrix not invertible
>
Please anyone could tell me how to fix this problem.
Thanks
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