Plot numpy datetime64 with matplotlib

Posted by enedene on Stack Overflow See other posts from Stack Overflow or by enedene
Published on 2012-07-07T15:05:43Z Indexed on 2012/07/07 15:15 UTC
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python

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datetime

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numpy

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matplotlib

I have two numpy arrays 1D, one is time of measurement in datetime64 format, for example:

array([2011-11-15 01:08:11, 2011-11-16 02:08:04, ..., 2012-07-07 11:08:00], dtype=datetime64[us])

and other array of same length and dimension with integer data.
I'd like to make a plot in matplotlib time vs data. If I put the data directly, this is what I get:

plot(timeSeries, data)

enter image description here

Is there a way to get time in more natural units? For example in this case months/year would be fine.

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