Re: [R] seemingly unrelated regression

2009-04-09 Thread Ben Bolker
livia wrote: > > Hello, > > I am working on the model of seemingly unrelated regression. I came across > with the error message: > > Log determinant of residual covariance: NA > Warning messages: > NAs generated in: log(x) > > I have three linear models which contain 21 explanatory variab

[R] seemingly unrelated regression

2009-04-09 Thread livia
Hello, I am working on the model of seemingly unrelated regression. I came across with the error message: Log determinant of residual covariance: NA Warning messages: NAs generated in: log(x) I have three linear models which contain 21 explanatory variables and there are about 300 data point