Displaying 2 results from an estimated 2 matches for "residuals_vs_fit".
2011 Apr 12
1
Model checking for gam (mgcv) result
...residuals plots of a gam model after a processus of model
selection. I found the "best" model, all my terms are significant, the
r-square and the deviance explained are good, but I have strange residuals
plots:
http://dl.dropbox.com/u/1169100/gam.check.png
http://dl.dropbox.com/u/1169100/residuals_vs_fitted.png
What does explains the "curve" on those plots??
I've also plotted each explanatory variables included in the model against
residuals and everything looks fine.
Kind regards,
Sam
[[alternative HTML version deleted]]
2011 Jun 09
0
Fwd: Re: residual checking for GAM (mgcv)
...l after a processus of model
> selection. I found the "best" model, all my terms are significant, the
> r-square and the deviance explained are good, but I have strange residuals
> plots:
>
> http://dl.dropbox.com/u/1169100/gam.check.png
> http://dl.dropbox.com/u/1169100/residuals_vs_fitted.png
>
> The curve is caused by the zeroes in my data.
>
> I've also plotted each explanatory variables included in the model
> against residuals
> and everything looks fine.
>
> Is this curve does not allow me to accept this model?
>
> Does the use of an other f...