Dear r users,

I wanted to perform contour figure from response surface model result. I typed this:

> model = rsm (Index ~ SO(NV, SKLON, pH), bonita) 
> summary(model)
> par(mfrow = c(2, 3))
> contour (model, ~NV+SKLON+pH)

However, I got the error answer as follows:
Error in lmobj$data[, nm] : 
  object of type 'environment' is not subsettable

Has someone any suggestions to solve this?

Thanks to all,
Michal
_________________________________________________________
Michal Bosela
National Forest Centre - Forest Research Institute Zvolen
Department of Forest Inventory and Management
T.G. Masaryka 22
960 92 Zvolen
Slovak Republic
Tel.:+421 045 5314 306 
Mail: bosela@nlcsk.org

NARODNE LESNICKE CENTRUM
http://www.nlcsk.org


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