Re: [Matplotlib-users] Bar charts with dates as X axis?

[John H. <jdh...@ac...>]

>>>>> "GHubert" == Hubert Hickman <hu...@tc...> writes:

    GHubert> Hello, I am trying to construct a plot that is a barchart
    GHubert> with the X-axis being dates.  I have used the plot_dates
    GHubert> to generated line plots that look great, however, other
    GHubert> than turning the dates into integers myself I cannot
    GHubert> figure out a way to do a barchart with dates as the
    GHubert> Xaxis.

    GHubert> Has anyone done one of these - I am using the wxPython
    GHubert> backend, if that matters.

I suggest you use integer (epoch) dates on the x axis of the bar as
provided by a datetime converter (see
http://matplotlib.sourceforge.net/matplotlib.dates.html) and then use
one of the many matplotlib datetime tick locators and formatters which
know how to format these epoch dates.  With any axes, you can set a
custom tick locator and/or formatter.  This is, in fact, what
plot_date does; see also
http://matplotlib.sourceforge.net/matplotlib.ticker.html and see the
examples (from http//matplotlib.sf.net/examples or in the matplotlib
src distribution in the examples subdir)

     custom_ticker1.py
     major_minor_demo1.py
and  major_minor_demo2.py

and take a look at the src code of the plot_date function in
matplotlib/axes.py for an example of using date tickers and
formatters.

Sorry I can't be of more help right now but I'm short on time; perhaps
someone else can provide a concrete example.

Cheers,
JDH