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import numpy as np from sklearn import datasets from sklearn.multiclass import OneVsRestClassifier,OneVsOneClassifier from sklearn.svm import LinearSVC,SVC from sklearn import cross_validation # load the iris dataset: iris = datasets.load_iris() X, y = iris.data, iris.target # prepare cross validation folds cv = cross_validation.StratifiedKFold(y, 5, shuffle=True, random_state=0) # one-vs-the-rest classifier = OneVsRestClassifier(LinearSVC()) print (np.mean(cross_validation.cross_val_score(classifier, X, y, cv=cv))) # one-vs-one classifier = OneVsOneClassifier(LinearSVC()) print (np.mean(cross_validation.cross_val_score(classifier, X, y, cv=cv))) # does this mean that one-vs-one is better? not necessarily... classifier = OneVsRestClassifier(SVC(C=1, kernel='rbf', gamma=0.5)) print (np.mean(cross_validation.cross_val_score(classifier, X, y, cv=cv)))