Dear r-help members
I posted this message already yesterday, but don't know whether it
reached you since I joined the group only yesterday.
I would like to estimate the boxcox transformed model
(y^t - 1)/t ~ b0 + b1 * x.
Unfortunately, R returns with an error message when I try to
perform this with the call
nls( I((y^t - 1)/t) ~ I(b0 + b1*x),
start = c(t=1,b0=0,b1=0), data = mydataframe)
The error message is: Object "t" not found
Apparently R seems not to accept parameters on the left hand
side of a regression model. I know that my do-it-yourself
strategy is not necessary, since the package box-cox is
available. Unfortunately, I want the use the box-cox
transformation in a quantile regression, i.e. I have to replace
nls by nlrq in the call above.
Any suggestions?
Thanks and best regards,
Johannes Ludsteck
<><><><><><><><><><><><><><><><><><>
Johannes Ludsteck
Institut fuer Volkswirtschaftslehre
Lehrstuhl Prof. Dr. Moeller
Universitaet Regensburg
Universitaetsstrasse 31
93053 Regensburg
Tel +49/0941/943-2741
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