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np.pmt causing unnecessary warnings

See original GitHub issue

Sometimes when using the np.pmt I enter 0.0 as an interest rate like so:

np.pmt(0.0, 180, 20000)

According to the documentation at http://docs.scipy.org/doc/numpy/reference/generated/numpy.pmt.html there is no restriction against a rate of 0 and the notes section in the docs even address the use case where rate = 0.

Yet every time I run the function with rate set to 0.0 I get the following warning:

Warning: invalid value encountered in double_scalars

I looked at the source and understand why its throwing the warning, but it really shouldn’t since 0 is a valid rate and should handle that case differently.

Issue Analytics

State:
Created 9 years ago
Comments:9 (6 by maintainers)

Top GitHub Comments

2reactions

argriffingcommented, Sep 4, 2014

what a strange function to have in numpy…

0reactions

Kai-Striegacommented, Jun 29, 2019

I think that should be closed too. It tries to fix the same issue (this one) also the last comment (https://github.com/numpy/numpy/pull/6073#issuecomment-248061826) is nearly three years old:

☔️ The latest upstream changes (presumably #8050) made this pull request unmergeable. Please resolve the merge conflicts.

I think we won’t see further changes any time soon.

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