Displaying 1 result from an estimated 1 matches for "totmas".
Did you mean:
tomas
2008 Feb 14
1
Cholmod error `matrix not positive definite'
Dear R-users,
I'm new to R, so my apologies if this question doesn't make sense.
I've tried the following model in lmer, and it works perfectly:
model<-lmer(aphids~densroot+zone+(1|zone/site), family=quasipoisson)
But if I try the exact same model with a different variable, totmas, the model looks as follows:
model<-lmer(aphids~totmas+zone+(1|zone/site), family=quasipoisson)
Totmas is also a continuous variable just like densroot, but in this case I receive the following message:
CHOLMOD warning: &߆e
Error in objective(.par, ...) :
Cholmod error `matrix not posi...