On Thu, May 31, 2012 at 9:31 AM, Mark Bakker <mark...@gmail.com> wrote:
> I looked at the example of overriding the default reporting of coords,
> which is here:
>
> http://matplotlib.sourceforge.net/examples/pylab_examples/coords_report.html
>
> from pylab import *
>
> def millions(x):
> return '$%1.1fM' % (x*1e-6)
>
> x = rand(20)
> y = 1e7*rand(20)
>
> ax = subplot(111)
> ax.fmt_ydata = millions
> plot(x, y, 'o')
>
> show()
>
> I don't understand what the millions function does (with a $ and M ?).
> In fact, I get the exact same result when I delete the line
>
> ax.fmt_ydata = millions
>
> Any thoughts?
>
Hi Mark,
It's a bit confusing, but there's actually two different types of
formatters. You're most likely looking for major/minor tick formatters (
example<http://matplotlib.sourceforge.net/examples/api/engineering_formatter.html>).
In the above example, the *cursor coordinate* is reformatted. In an
interactive window, you should see the current cursor position in the lower
left (this may depend on the backend)---that's the value that should be
reformatted by the `millions` function.
Best,
-Tony
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