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judy
2010 Jul 28
1
strange error : isS4(x) in gamm function (mgcv package). Variable in data-frame not recognized???
Dear all,
I run a gamm with following call :
result <- try(gamm(values~ s( VM )+s( RH )+s( TT )+s( PP
)+RF+weekend+s(day)+s(julday) ,correlation=corCAR1(form=~ day|month
),data=tmp) )"
with mgcv version 1.6.2
No stress about the data, the error is not data-related. I get :
Error in isS4(x) : object 'VM' not found
What so? I did define the dataframe to be used, and the dataframe
contains a variable VM :
> s...