--- a +++ b/binary_classification/svm.py @@ -0,0 +1,37 @@ +from sklearn import svm +from sklearn.metrics import roc_auc_score +from util import roc_results, results + + +def svm_training(x_train, y_train): + """ + :param x_train: the x-values we want to train on (2D numpy array) + :param y_train: the y-values that correspond to x_train (1D numpy array) + :return: sklearn SVM Classifier object that can now be used for predictions + """ + clf = svm.SVC(kernel='sigmoid', C=87, gamma=0.0212, random_state=0) + clf.fit(x_train, y_train) + return clf + + +def svm_classification(clf, x_test): + """ + :param clf: trained sklearn SVM Classifier object + :param x_test: the x-values we want to get predictions on (2D numpy array) + :return: a 1D numpy array containing the predictions + """ + return clf.predict(x_test) + + +def svm_pipeline(x_train, y_train, x_test, y_test): + """ + :param x_train: the x-values we want to train on (2D numpy array) + :param y_train: the y-values that correspond to x_train (1D numpy array) + :param x_test: the x-values we want to test on (2D numpy array) + :param y_test: the y-values that correspond to x_test (1D numpy array) + :return: the roc auc score + """ + clf = svm_training(x_train, y_train) + y_pred = svm_classification(clf, x_test) + roc_results(y_pred, y_test, 'SVM') + return roc_auc_score(y_test, y_pred), results(y_pred, y_test)