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To: Peter Pearson <pkpearson@nowhere.invalid>
cc: python-list@python.org, lac@openend.se
From: Laura Creighton <lac@openend.se>
Subject: Re: Matplotlib X-axis timezone trouble
In-Reply-To: Message from Peter Pearson <pkpearson@nowhere.invalid> of "30 Jun 2015 00:56:26 +0000." <cve7ppFk1viU1@mid.individual.net>
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Date: Tue, 30 Jun 2015 04:03:57 +0200
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In a message of 30 Jun 2015 00:56:26 +0000, Peter Pearson writes:
>The following code produces a plot with a line running from (9:30, 0) to
>(10:30, 1), not from (8:30, 0) to (9:30, 1) as I desire.
>
>If I use timezone None instead of pacific, the plot is as desired, but
>of course that doesn't solve the general problem of which this is a
>much-reduced example.
>
>If I use timezone US/Central, I get the same (bad) plot.
>
>import matplotlib.pyplot as plt
>import datetime
>import pytz
>pacific =3D pytz.timezone("US/Pacific")
>fig =3D plt.figure()
>plt.plot([datetime.datetime(2014, 10, 7, 8, 30, tzinfo=3Dpacific),
>          datetime.datetime(2014, 10, 7, 9, 30, tzinfo=3Dpacific)],
>         [0,1], marker=3D"o", color=3D"green")
>fig.autofmt_xdate()
>plt.show()
>
>Does anybody know why this shift is occurring?  Is Matplotlib
>confused about what timezone to use in labeling the axis?  How
>would I tell it what timezone to use (preferably explicitly in
>the code, not in matplotlibrc)?
>
>Thanks.
>
>-- =

>To email me, substitute nowhere->runbox, invalid->com.
>-- =

>https://mail.python.org/mailman/listinfo/python-list


I know that your problem is that all your times are in UTC, even
though you do not want this.  I had this too.  I forget what I did.

I do not know if this solution from stackoverflow.com will work for
you -- it is definitely different from what I did, but that does
not in any way make it wrong.  Try and see?  and report back?

http://stackoverflow.com/questions/4485607/matplotlib-plot-date-keeping-ti=
mes-in-utc-even-with-custom-timezone