Document feedback

Question document fragment

When a question document fragment contains a formula, it is displayed as a space.

Submission type

issue

It's a little complicated...

I'd like to ask someone.

PR

Just a small problem.

I can fix it online!

Please select the submission type

Problem type

Specifications and Common Mistakes

- Specifications and Common Mistakes:

- Misspellings or punctuation mistakes,incorrect formulas, abnormal display.

- Incorrect links, empty cells, or wrong formats.

- Chinese characters in English context.

- Minor inconsistencies between the UI and descriptions.

- Low writing fluency that does not affect understanding.

- Incorrect version numbers, including software package names and version numbers on the UI.

Usability

- Usability:

- Incorrect or missing key steps.

- Missing main function descriptions, keyword explanation, necessary prerequisites, or precautions.

- Ambiguous descriptions, unclear reference, or contradictory context.

- Unclear logic, such as missing classifications, items, and steps.

Correctness

- Correctness:

- Technical principles, function descriptions, supported platforms, parameter types, or exceptions inconsistent with that of software implementation.

- Incorrect schematic or architecture diagrams.

- Incorrect commands or command parameters.

- Incorrect code.

- Commands inconsistent with the functions.

- Wrong screenshots.

- Sample code running error, or running results inconsistent with the expectation.

Risk Warnings

- Risk Warnings:

- Lack of risk warnings for operations that may damage the system or important data.

Content Compliance

- Content Compliance:

- Contents that may violate applicable laws and regulations or geo-cultural context-sensitive words and expressions.

- Copyright infringement.

Please select the type of question

Problem description

Describe the bug so that we can quickly locate the problem.

Submit

Document feedback

mindspore.ops.blackman_window

mindspore.ops.blackman_window(window_length, periodic=True, *, dtype=None)

Blackman window function.

Usually used to extract finite signal segment for FFT.

$$w[n]=0.42-0.5cos(\frac{2\pi n}{N-1})+0.08cos(\frac{4\pi n}{N-1})$$

where $N$ is the full window size, and n is natural number less than $N$ :[0, 1, …, N-1].

Parameters

• window_length (Tensor) – The size of window.

• periodic (bool, optional) – If True , return a periodic window. If False, return a symmetric window. Default True .

Keyword Arguments

dtype (mindspore.dtype, optional) – The data type specified. Default None .

Returns

A 1-D tensor.

Supported Platforms:

Ascend GPU CPU

Examples

>>> import mindspore
>>> window_length = mindspore.tensor(10)
>>> output = mindspore.ops.blackman_window(window_length)
>>> print(output)
[-2.9802322e-08  4.0212840e-02  2.0077014e-01  5.0978714e-01
  8.4922993e-01  1.0000000e+00  8.4922981e-01  5.0978690e-01
  2.0077008e-01  4.0212870e-02]