Re: [Matplotlib-users] Change xaxis labels

[Paul I. <piv...@gm...>]

C M, on 2012-02-06 09:33,  wrote:
> On Mon, Feb 6, 2012 at 9:23 AM, David Craig <dcd...@gm...> wrote:
> 
> > Hi, I have a plot and the xaxis shows number of seconds after a start
> > point. I would like to convert them to days anyone know how to do this.
> > I have looked at the documentation but cant find what I need.
> 
> Couldn't you divide your data points by the conversion (86400) before
> plotting?  E.g., 432,000 seconds then becomes 5 days.

Another way to do this is to change the Formatter which generates
what the labels of each tick out to be to do this computation.

Take a look at this example:
http://matplotlib.sourceforge.net/examples/api/date_index_formatter.html

Just define something like:

def your_function(x,pos=None):
    return "%d days" % (x/86400)

ax.xaxis.set_major_formatter(ticker.FuncFormatter(your_function))

best,
-- 
Paul Ivanov
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