[R] gam.plot y axes meaning

Simon Wood simon at stats.gla.ac.uk
Tue May 13 14:41:14 CEST 2003

> Im starting to work with GAM using mgcv in R. When I plot a gam object 
> using gam.plot, the y axes is labelled s(cov,edf), but I dont undertand 
> what means the units of  y axes (is related with the predictor variable?).

- The y axes are on the scale of the linear predictor of your model. i.e.
The units are link(response units). [Note that smooths are "centred" to
ensure model identifiability - they sum to 0 over the covariate values].


> Simon Wood simon at stats.gla.ac.uk        www.stats.gla.ac.uk/~simon/
>>  Department of Statistics, University of Glasgow, Glasgow, G12 8QQ
>>>   Direct telephone: (0)141 330 4530          Fax: (0)141 330 4814

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