mindspore.numpy.blackman

mindspore.numpy.blackman(M)[源代码]

Returns the Blackman window. The Blackman window is a taper formed by using the first three terms of a summation of cosines. It was designed to have close to the minimal leakage possible. It is close to optimal, only slightly worse than a Kaiser window.

Parameters: M (int) – Number of points in the output window. If zero or less, an empty array is returned.
Returns: Tensor, the window, with the maximum value normalized to one (the value one appears only if the number of samples is odd).
Raises: TypeError – If M is not an int.

Supported Platforms:: Ascend GPU CPU

Examples

>>> import mindspore.numpy as np
>>> print(np.blackman(12))
[-1.4901161e-08  3.2606430e-02  1.5990365e-01  4.1439798e-01
7.3604518e-01  9.6704674e-01  9.6704674e-01  7.3604518e-01
4.1439798e-01  1.5990365e-01  3.2606430e-02 -1.4901161e-08]