[R-sig-ME] Message error
bbolker at gmail.com
Sun Mar 30 16:59:09 CEST 2014
We probably need more detail to know anything for sure.
These warnings were introduced in the most recent release of lme4
(1.1-5), and *may* be false positives. Two things to check:
(1) is your model fit singular? If m is your fitted model, try
lbound <- getME(m,"lower")
theta <- getME(m,"theta")
any(lbound==0 & theta<1e-8)
or fit your model with (g)lmerControl(check.conv.singular="warning")
(2) if this is a glmer() fit, try glmerControl(optimizer="bobyqa") and
see if that helps.
On 14-03-29 03:25 PM, Neil Collier wrote:
> I'm not sure about the details of the error message but if R is suggesting
> to rescale the variables then you can do this using the scale() function as
> one option. Doing this usually helps the model converge.
> On Fri, Mar 28, 2014 at 1:31 PM, Cintia Akemi Oi <
> CintiaAkemi.Oi at bio.kuleuven.be> wrote:
>> I'm having this warning messages:
>> Warning messages:
>> 1: In checkConv(attr(opt, "derivs"), opt$par, ctrl = control$checkConv, :
>> Model failed to converge with max|grad| = 0.0523852 (tol = 0.001)
>> 2: In checkConv(attr(opt, "derivs"), opt$par, ctrl = control$checkConv, :
>> Model is nearly unidentifiable: very large eigenvalue
>> - Rescale variables?
>> Thanks in advance.
>> [[alternative HTML version deleted]]
>> R-sig-mixed-models at r-project.org mailing list
> [[alternative HTML version deleted]]
> R-sig-mixed-models at r-project.org mailing list
More information about the R-sig-mixed-models