I've created a test for Axes.streamplot in test_datetime.py as requested in#26864
I tried using the normal datetime.datetime data type and passing that into np.meshgrid. However, it looks like np.meshgrid doesn't accept the datetime type and only accepts numerical arrays. I tried doing some research and looking into np.meshgrid further but could not find any way to pass in an array of datetime values. Therefore, I had to convert the datetime values into numerical values using date2num. This allows it to be passed into np.meshgrid to create the X and Y arrays which are then passed into the streamplot function.

Note: I am new to working with matplotlib and also new to open-source contributions so I would really appreciate your support and advice on this PR.

The outputted graph is as follows:

PR checklist

"closes #0000" is in the body of the PR description tolink the related issue
new and changed code istested
Plotting related features are demonstrated in anexample
[ N/A]New Features andAPI Changes are noted with adirective and release note
[ N/A] Documentation complies withgeneral anddocstring guidelines

Adding datetime test for axes.streamplot

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Dec 10, 2023

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