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2008 Jul 24
0
Problem with GLS dwtest function
..., but when I try to use the
dwtest function in the lmtest library, I get the error message "Error in
terms.default(formula) : no terms component".
The model and data set are below. Any suggestions would be really helpful!
Thanks a lot in advance,
M. Grace
fitp2:
fitp2<-gls(V3_total~D_total+P_total,data=pdata,weights=varPower())
based on the data set pdata:
pdata
D_total V3_total P_total
1 75 158000 302.033
2 221 258000 126.664
3 1050 280000 538.547
4 8100 208000 1090.068
5 22100 235000 2038.937
6 5300 570000 2626.226
7 3250 45...