sklearn.metrics.pairwise.polynomial_kernel

sklearn.metrics.pairwise.polynomial_kernel(X, Y=None, degree=3, gamma=None, coef0=1)

源码

计算X和Y之间的多项式内核:

K(X, Y) = (gamma <X, Y> + coef0)^degree

用户指南中阅读更多内容。

参数 说明
X ndarray of shape (n_samples_1, n_features)
Y ndarray of shape (n_samples_2, n_features)
degree int, default 3
gamma float, default None
如果为None,则默认为1.0 / n_features
coef0 float, default 1
返回值 说明
Gram matrix array of shape (n_samples_1, n_samples_2)