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
