Fix specgram test on NumPy 1.20. #19371
Merged
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PR Summary
In NumPy 1.20, the fft is slightly different (more accurate?) and returns 0 as the last entry, instead of some small number ~1e-30. This causes a divide-by-zero warning in
log10
. However, this test doesn't really care about the spectrogram, just the frequencies, so we can change the scale to linear to avoid the warning.PR Checklist
pytest
passes).flake8
on changed files to check).flake8-docstrings
and runflake8 --docstring-convention=all
).doc/users/next_whats_new/
(follow instructions in README.rst there).doc/api/next_api_changes/
(follow instructions in README.rst there).