Re: [R] Support Vector Machines
I see that index is giving me the group for the classification problem. But my problem is not the same. I had a sample X<-rnorm(1000) for example. I don't want to make classification (i have only one group in fact) but i want to estimate the density which generates my sample (like i can do with others methods like kernel density estimation, wavelets estimations, splines ...). So, logically, i hope i will find an approximation of the Gaussian density. But i don't see how i can obtain this density estimation with the function svm. Thanks David Winsemius wrote: > > > On May 5, 2009, at 3:49 AM, excalibur wrote: > >> >> In the R-help of the svm function of the package e1071 it's >> explained that >> this function also makes estimation of density. >> >> But when i made for example >> X<-rnorm(1000) >> m<-svm(X) >> >> I just have a binary classification of X like SVM do whereas i want an >> estimation of the density which generates our sample X ... >> >> I don't know if it's possible and if someone has already use this >> function >> to do that. > > Use str() to look at the object returned by svm. The example in svm's > help page uses the svm object's "index" variable although there are > other components that are available for extraction. The "fitted" > vector looks to have similar binary properties to "index" and the "SV" > vector appears to be a distance measure. > > -- > David > >> >> >> Thanks. >> >> >> David Winsemius wrote: >>> >>> >>> On May 4, 2009, at 8:52 AM, excalibur wrote: >>> This question is still unanswered. >>> >>> Unanswered questions are often those which do not comply with the >>> guidelines in the Posting Guide. Many people have gotten tired of >>> either making up examples or of writing "Read the Posting Guide", so >>> they just ignore them. >>> >>> Someone can explain me how use the svm function to make density estimation ? >>> >>> If you post an executable bit of code that shows how you are doing >>> those operations, then I suspect someone will answer. >>> >>> excalibur wrote: > > Hi, > i try to use function svm of package e1071 to estimate a density. > > But if my data are X=(X1,...,Xn) and m<-svm(X) some values of m$SV > are > less than 0. > I don't see how i can get the estimation of the density with this > function. > > Thanks for your help. > > Rémi > >>> >>> David Winsemius, MD >>> Heritage Laboratories >>> West Hartford, CT >>> >>> __ >>> R-help@r-project.org mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-help >>> PLEASE do read the posting guide >>> http://www.R-project.org/posting-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >>> >>> >> >> -- >> View this message in context: >> http://www.nabble.com/Support-Vector-Machines-tp19069442p23382683.html >> Sent from the R help mailing list archive at Nabble.com. >> >> __ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. > > David Winsemius, MD > Heritage Laboratories > West Hartford, CT > > __ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > -- View this message in context: http://www.nabble.com/Support-Vector-Machines-tp19069442p23386300.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Support Vector Machines
svm() in the e1071 package is an interface to the libsvm code. Look at the
link provided in the help page for that function. You will have to read up how
density estimation is achieved via one-class SVM.
Andy
From: excalibur
>
> In the R-help of the svm function of the package e1071 it's
> explained that
> this function also makes estimation of density.
>
> But when i made for example
> X<-rnorm(1000)
> m<-svm(X)
>
> I just have a binary classification of X like SVM do whereas i want an
> estimation of the density which generates our sample X ...
>
> I don't know if it's possible and if someone has already use
> this function
> to do that.
>
> Thanks.
>
>
> David Winsemius wrote:
> >
> >
> > On May 4, 2009, at 8:52 AM, excalibur wrote:
> >
> >>
> >> This question is still unanswered.
> >
> > Unanswered questions are often those which do not comply with the
> > guidelines in the Posting Guide. Many people have gotten tired of
> > either making up examples or of writing "Read the Posting
> Guide", so
> > they just ignore them.
> >
> >
> >> Someone can explain me how use the svm function to make density
> >> estimation ?
> >
> > If you post an executable bit of code that shows how you are doing
> > those operations, then I suspect someone will answer.
> >
> > excalibur wrote:
> >>
> >>>
> >>> Hi,
> >>> i try to use function svm of package e1071 to estimate a density.
> >>>
> >>> But if my data are X=(X1,...,Xn) and m<-svm(X) some
> values of m$SV
> >>> are
> >>> less than 0.
> >>> I don't see how i can get the estimation of the density with this
> >>> function.
> >>>
> >>> Thanks for your help.
> >>>
> >>> Rémi
> >>>
> >
> > David Winsemius, MD
> > Heritage Laboratories
> > West Hartford, CT
> >
> > __
> > R-help@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> > http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/Support-Vector-Machines-tp19069442p23382683.html
> Sent from the R help mailing list archive at Nabble.com.
>
> __
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
Notice: This e-mail message, together with any attachme...{{dropped:12}}
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Support Vector Machines
On May 5, 2009, at 3:49 AM, excalibur wrote: In the R-help of the svm function of the package e1071 it's explained that this function also makes estimation of density. But when i made for example X<-rnorm(1000) m<-svm(X) I just have a binary classification of X like SVM do whereas i want an estimation of the density which generates our sample X ... I don't know if it's possible and if someone has already use this function to do that. Use str() to look at the object returned by svm. The example in svm's help page uses the svm object's "index" variable although there are other components that are available for extraction. The "fitted" vector looks to have similar binary properties to "index" and the "SV" vector appears to be a distance measure. -- David Thanks. David Winsemius wrote: On May 4, 2009, at 8:52 AM, excalibur wrote: This question is still unanswered. Unanswered questions are often those which do not comply with the guidelines in the Posting Guide. Many people have gotten tired of either making up examples or of writing "Read the Posting Guide", so they just ignore them. Someone can explain me how use the svm function to make density estimation ? If you post an executable bit of code that shows how you are doing those operations, then I suspect someone will answer. excalibur wrote: Hi, i try to use function svm of package e1071 to estimate a density. But if my data are X=(X1,...,Xn) and m<-svm(X) some values of m$SV are less than 0. I don't see how i can get the estimation of the density with this function. Thanks for your help. Rémi David Winsemius, MD Heritage Laboratories West Hartford, CT __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- View this message in context: http://www.nabble.com/Support-Vector-Machines-tp19069442p23382683.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. David Winsemius, MD Heritage Laboratories West Hartford, CT __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Support Vector Machines
In the R-help of the svm function of the package e1071 it's explained that this function also makes estimation of density. But when i made for example X<-rnorm(1000) m<-svm(X) I just have a binary classification of X like SVM do whereas i want an estimation of the density which generates our sample X ... I don't know if it's possible and if someone has already use this function to do that. Thanks. David Winsemius wrote: > > > On May 4, 2009, at 8:52 AM, excalibur wrote: > >> >> This question is still unanswered. > > Unanswered questions are often those which do not comply with the > guidelines in the Posting Guide. Many people have gotten tired of > either making up examples or of writing "Read the Posting Guide", so > they just ignore them. > > >> Someone can explain me how use the svm function to make density >> estimation ? > > If you post an executable bit of code that shows how you are doing > those operations, then I suspect someone will answer. > > excalibur wrote: >> >>> >>> Hi, >>> i try to use function svm of package e1071 to estimate a density. >>> >>> But if my data are X=(X1,...,Xn) and m<-svm(X) some values of m$SV >>> are >>> less than 0. >>> I don't see how i can get the estimation of the density with this >>> function. >>> >>> Thanks for your help. >>> >>> Rémi >>> > > David Winsemius, MD > Heritage Laboratories > West Hartford, CT > > __ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > -- View this message in context: http://www.nabble.com/Support-Vector-Machines-tp19069442p23382683.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Support Vector Machines
This question is still unanswered. Someone can explain me how use the svm function to make density estimation ? Thanks ... excalibur wrote: > > Hi, > i try to use function svm of package e1071 to estimate a density. > > But if my data are X=(X1,...,Xn) and m<-svm(X) some values of m$SV are > less than 0. > I don't see how i can get the estimation of the density with this > function. > > Thanks for your help. > > Rémi > -- View this message in context: http://www.nabble.com/Support-Vector-Machines-tp19069442p23366761.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Support Vector Machines
On May 4, 2009, at 8:52 AM, excalibur wrote: This question is still unanswered. Unanswered questions are often those which do not comply with the guidelines in the Posting Guide. Many people have gotten tired of either making up examples or of writing "Read the Posting Guide", so they just ignore them. Someone can explain me how use the svm function to make density estimation ? If you post an executable bit of code that shows how you are doing those operations, then I suspect someone will answer. excalibur wrote: Hi, i try to use function svm of package e1071 to estimate a density. But if my data are X=(X1,...,Xn) and m<-svm(X) some values of m$SV are less than 0. I don't see how i can get the estimation of the density with this function. Thanks for your help. Rémi David Winsemius, MD Heritage Laboratories West Hartford, CT __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Support Vector Machines
Hi, i try to use function svm of package e1071 to estimate a density. But if my data are X=(X1,...,Xn) and m<-svm(X) some values of m$SV are less than 0. I don't see how i can get the estimation of the density with this function. Thanks for your help. Rémi -- View this message in context: http://www.nabble.com/Support-Vector-Machines-tp19069442p19069442.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
