Re: [Scikit-learn-general] SVM with rbf kernel

2014-10-22 Thread Pagliari, Roberto
n similar results. HTH, Michael Thank you, From: Pagliari, Roberto [mailto:rpagli...@appcomsci.com<mailto:rpagli...@appcomsci.com>] Sent: Tuesday, October 21, 2014 9:39 AM To: scikit-learn-general@lists.sourceforge.net<mailto:scikit-learn-general@lists.sourceforge.net> Subject: Re: [S

Re: [Scikit-learn-general] SVM with rbf kernel

2014-10-21 Thread Michael Eickenberg
al stability and results with LibLinear > (LinearSVM) are satisfactory, then you should try using > `sklearn.svm.SVC(kernel="linear")` and check if you obtain similar results. > > HTH, > Michael > > >> >> >> Thank you, >> >> >> >

Re: [Scikit-learn-general] SVM with rbf kernel

2014-10-21 Thread Michael Eickenberg
; > > I will try tuning gamma but, again, with quantization it seems to be > working just fine. > > > > Thanks, > > > > *From:* Michael Eickenberg [mailto:michael.eickenb...@gmail.com > ] > *Sent:* Tuesday, October 21, 2014 9:32 AM > *To:* scikit-learn-gen

Re: [Scikit-learn-general] SVM with rbf kernel

2014-10-21 Thread Sebastian Raschka
Hi, Roberto > Does anyone know if rbf is constrained in terms of number of dimensions? No, there is no constraint on the number of dimensions > I sometimes get weird results with SVM and rbf kernel in terms of false > positive/negative rates. Maybe you are overfitting or the data is just not

Re: [Scikit-learn-general] SVM with rbf kernel

2014-10-21 Thread Pagliari, Roberto
that many samples (for example, numerical issues)? Thank you, From: Pagliari, Roberto [mailto:rpagli...@appcomsci.com] Sent: Tuesday, October 21, 2014 9:39 AM To: scikit-learn-general@lists.sourceforge.net Subject: Re: [Scikit-learn-general] SVM with rbf kernel Hi, I was asking if having lot of

Re: [Scikit-learn-general] SVM with rbf kernel

2014-10-21 Thread Pagliari, Roberto
...@gmail.com] Sent: Tuesday, October 21, 2014 9:32 AM To: scikit-learn-general@lists.sourceforge.net Subject: Re: [Scikit-learn-general] SVM with rbf kernel Dear Roberto, On Tue, Oct 21, 2014 at 2:58 PM, Pagliari, Roberto mailto:rpagli...@appcomsci.com>> wrote: I sometimes get weird results wi

Re: [Scikit-learn-general] SVM with rbf kernel

2014-10-21 Thread Michael Eickenberg
Dear Roberto, On Tue, Oct 21, 2014 at 2:58 PM, Pagliari, Roberto wrote: > I sometimes get weird results with SVM and rbf kernel in terms of false > positive/negative rates. > > > > I suspect there may be numerical issues going on, because I’m not seeing > the same issues with linearSVC. > > > T