search for: residuals_vs_fitted

Displaying 2 results from an estimated 2 matches for "residuals_vs_fitted".

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 fami...