X_2d = X[:, :6] if the data is formatted correctly. Its rows by cols and
then slicing. The numpy docs should help
On Mar 8, 2013 3:12 PM, "Mohamed Radhouane Aniba" <arad...@gmail.com> wrote:
> Thank you guys it makes more sense now.
>
> I slightly changed the code to fit my data ( I have 6 features)
>
> I got then an error message saying :
>
> File "plot_rbf_parameters.py", line 109, in <module>
> Z = clf.decision_function(np.c_[xx.ravel(), yy.ravel()])
> File
> "/Library/Python/2.7/site-packages/scikit_learn-0.13.1-py2.7-macosx-10.8-intel.egg/sklearn/svm/base.py",
> line 365, in decision_function
> X = self._validate_for_predict(X)
> File
> "/Library/Python/2.7/site-packages/scikit_learn-0.13.1-py2.7-macosx-10.8-intel.egg/sklearn/svm/base.py",
> line 412, in _validate_for_predict
> (n_features, self.shape_fit_[1]))
> ValueError: X.shape[1] = 2 should be equal to 6, the number of features at
> training time
>
>
> around that line :
>
> Z = clf.decision_function(np.c_[xx.ravel(), yy.ravel()])
>
> How can I make X.shape[1]=6 instead of 2
>
> Sorry if that sounds a newbie request
>
> Thanks
>
> Rad
>
> On Mar 8, 2013, at 2:54 PM, Flavio Vinicius <flavio...@gmail.com> wrote:
>
> > Suppose you have
> >
> > x = np.array([1, 2, 3, 4])
> >
> > Then
> >
> > x > 2 = [False, False, True, True]
> >
> > Using boolean indexing
> >
> > x[x > 2] = [3, 4]
> > --
> > Flavio
> >
> >
> > On Fri, Mar 8, 2013 at 4:41 PM, Ronnie Ghose <ronnie.gh...@gmail.com>
> wrote:
> >> That uses the Boolean indexing function of numpy arrays iirc
> >>
> >> On Mar 8, 2013 1:28 PM, "Mohamed Radhouane Aniba" <arad...@gmail.com>
> wrote:
> >>>
> >>> Simply because I am new to both python and scikit (Coming from R world)
> >>>
> >>> The problem is that I tried using load_svmlight_file with in particular
> >>> RBF parameters example
> >>>
> http://scikit-learn.org/stable/auto_examples/svm/plot_rbf_parameters.html#example-svm-plot-rbf-parameters-py
> >>>
> >>> and I get a lot of problems / errors/ so I thought it is easier to use
> >>> native format which preserve the structure of the variables used.
> >>>
> >>> What I tested in this script in particular is something like :
> >>>
> >>> #iris = load_iris()
> >>> #X = iris.data
> >>> #Y = iris.target
> >>> X,Y = load_svmlight_file("toto")
> >>> X = X.toarray()
> >>>
> >>> # dataset for decision function visualization
> >>>
> >>> X_2d = X[:, :2]
> >>> X_2d = X_2d[Y > 0]
> >>> Y_2d = Y[Y > 0]
> >>> Y_2d -= 1
> >>>
> >>> What does the section _2d means ? not vey clear
> >>>
> >>> Rad
> >>>
> >>> On Mar 8, 2013, at 1:21 PM, Philipp Singer <kill...@gmail.com> wrote:
> >>>
> >>>> Why do you want to convert libsvm to another structure?
> >>>>
> >>>> I don't quite get it.
> >>>>
> >>>> If you want to use examples: scikit learn has included datasets that
> can
> >>>> be directly loaded. I think this section should help:
> >>>> http://scikit-learn.org/stable/datasets/index.html
> >>>>
> >>>> Am 08.03.2013 18:44, schrieb Mohamed Radhouane Aniba:
> >>>>> Hello !
> >>>>>
> >>>>> I am wondering if someone has developed a snippet or a script that
> >>>>> converts libsvm format into a format directly usable by scikit
> without the
> >>>>> need to use of load_svmlight_file.
> >>>>>
> >>>>> The reason is that I am trying to use the examples provided on the
> >>>>> website, but all of them are written in a format that is not a
> libsvm one.
> >>>>>
> >>>>> Thanks
> >>>>>
> >>>>> Rad
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> ------------------------------------------------------------------------------
> >>>>> Symantec Endpoint Protection 12 positioned as A LEADER in The
> Forrester
> >>>>> Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in
> the
> >>>>> endpoint security space. For insight on selecting the right partner
> to
> >>>>> tackle endpoint security challenges, access the full report.
> >>>>> http://p.sf.net/sfu/symantec-dev2dev
> >>>>> _______________________________________________
> >>>>> Scikit-learn-general mailing list
> >>>>> Scikit-learn-general@lists.sourceforge.net
> >>>>> https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
> >>>>
> >>>>
> >>>>
> >>>>
> ------------------------------------------------------------------------------
> >>>> Symantec Endpoint Protection 12 positioned as A LEADER in The
> Forrester
> >>>> Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in
> the
> >>>> endpoint security space. For insight on selecting the right partner to
> >>>> tackle endpoint security challenges, access the full report.
> >>>> http://p.sf.net/sfu/symantec-dev2dev
> >>>> _______________________________________________
> >>>> Scikit-learn-general mailing list
> >>>> Scikit-learn-general@lists.sourceforge.net
> >>>> https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
> >>>
> >>>
> >>>
> >>>
> ------------------------------------------------------------------------------
> >>> Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester
> >>> Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the
> >>> endpoint security space. For insight on selecting the right partner to
> >>> tackle endpoint security challenges, access the full report.
> >>> http://p.sf.net/sfu/symantec-dev2dev
> >>> _______________________________________________
> >>> Scikit-learn-general mailing list
> >>> Scikit-learn-general@lists.sourceforge.net
> >>> https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
> >>
> >>
> >>
> ------------------------------------------------------------------------------
> >> Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester
> >> Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the
> >> endpoint security space. For insight on selecting the right partner to
> >> tackle endpoint security challenges, access the full report.
> >> http://p.sf.net/sfu/symantec-dev2dev
> >> _______________________________________________
> >> Scikit-learn-general mailing list
> >> Scikit-learn-general@lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
> >>
> >
> >
> ------------------------------------------------------------------------------
> > Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester
> > Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the
> > endpoint security space. For insight on selecting the right partner to
> > tackle endpoint security challenges, access the full report.
> > http://p.sf.net/sfu/symantec-dev2dev
> > _______________________________________________
> > Scikit-learn-general mailing list
> > Scikit-learn-general@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
>
>
>
> ------------------------------------------------------------------------------
> Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester
> Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the
> endpoint security space. For insight on selecting the right partner to
> tackle endpoint security challenges, access the full report.
> http://p.sf.net/sfu/symantec-dev2dev
> _______________________________________________
> Scikit-learn-general mailing list
> Scikit-learn-general@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
>
------------------------------------------------------------------------------
Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester
Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the
endpoint security space. For insight on selecting the right partner to
tackle endpoint security challenges, access the full report.
http://p.sf.net/sfu/symantec-dev2dev
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