mindspore.numpy.polyval

mindspore.numpy.polyval(p, x)[源代码]

Evaluates a polynomial at specific values. If p is of length N, this function returns the value: p[0]*x**(N-1) + p[1]*x**(N-2) + ... + p[N-2]*x + p[N-1] If x is a sequence, then p(x) is returned for each element of x. If x is another polynomial then the composite polynomial p(x(t)) is returned.

说明

Numpy object poly1d is currently not supported.

参数

p (Union[int, float, bool, list, tuple, Tensor) – 1D array of polynomial coefficients (including coefficients equal to zero) from highest degree to the constant term.
x (Union[int, float, bool, list, tuple, Tensor) – A number, an array of numbers, at which to evaluate p.

返回

Tensor.

异常

ValueError – If p has more than 1 dimensions.

Supported Platforms:: Ascend GPU CPU

样例

>>> import mindspore.numpy as np
>>> print(np.polyval([3.,0.,1.], 5.))
76.0