跟着Leo机器学习：sklearn之Stochastic Gradient Descent

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sklearn框架

函数导图

1.5.1. Classification

from sklearn.linear_model import SGDClassifier
X = [[0., 0.], [1., 1.]]
y = [0, 1]
clf = SGDClassifier(loss="hinge", penalty="l2", max_iter=5)
clf.fit(X, y)
clf.predict([[2., 2.]])
clf.coef_

clf = SGDClassifier(loss="log", max_iter=5).fit(X, y)
clf.predict_proba([[1., 1.]])

1.5.2. Regression

参数更改：

loss=“squared_loss”: Ordinary least squares,
loss=“huber”: Huber loss for robust regression,
loss=“epsilon_insensitive”: linear Support Vector Regression.