
Dear All:

I am having a problem with the function...........lmer()

The data looks like...........

id time res-----------(responses are all positive continuous)
1  1 
1  2
1  3
1  6
2  1
2  2
2  3
2  6
.
.
.
.

i used a gamma model like............with two types of link function......(inverse and log), I also tried identity............they also shows different types of problem............

> m1.1.0g2<-lmer(response0g~time0g+(1|id0g),family=Gamma(link = "inverse"))
Error in mer_finalize(ans) : mu[i] must be positive: mu = -16, i = 37


> m1.1.0g2<-lmer(response0g~time0g+(1|id0g),family=Gamma(link = "log"))
> 
> m1.1.0g2
Error in asMethod(object) : matrix is not symmetric [1,2]

Any kinds of helps (as well as idea) will be highly appreciable..........Thanks...........

Regards.....

Rajib..............http://rimian85.web.officelive.com/





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