quiz5.py 文件源码

def quiz15():
    X, Y, N = read_file("features.train")
    Y_0 = (Y == 0).astype(int)

    c_l = []
    w_l = []
    for i in range(-6, 4, 2):
        c = 10 ** i
        c_l.append(c)
        clf = svm.SVC(C=c, kernel='linear', shrinking=False)
        clf.fit(X, Y_0)
        w = clf.coef_.flatten()
        norm_w = np.linalg.norm(w, ord=2)
        w_l.append(norm_w)
        print("C = ", c, '    norm(w) =', norm_w)

    plt.semilogx(c_l, w_l)
    plt.savefig("h5_q15.png", dpi=300)