9.8.4.3. sklearn.metrics.pairwise.polynomial_kernel

sklearn.metrics.pairwise.polynomial_kernel(X, Y=None, degree=3, gamma=0, coef0=1)

Compute the polynomial kernel between X and Y.

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

Parameters :

X: array of shape (n_samples_1, n_features) :

Y: array of shape (n_samples_2, n_features) :

degree: int :

Returns :

Gram matrix: array of shape (n_samples_1, n_samples_2) :