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corstruct
2005 May 17
0
problem with gls : combining weights and correlation structure
Dear R-users,
I hope you will have time to read me and I will try to be brief. I am also
sorry for my poor english.
I used gls function from the package nlme to correct two types of bias in my
database. At first, because my replicates are spatially aggregated, I would
like to fit a corStruct function like corLin, corSpher, corRatio, corExp or
corGaus in my gls model, and simultaneously, because my response variable is
an estimate, I would like to use weights to take into account the accuracy of
the estimation. I used a varFixed object corresponding to squared standard
error.
Vario...