I think this is just historical, since matplotlib never used to rely on
having proper Unicode character rendering in all backends. (And
displaying a multiplication symbol, rather than just * or x requires
non-ascii). I believe that is no longer a problem these days, so we
could change it to display a multiplication symbol.
This doesn't appear to be a regression from an earlier version. Was
that what you're implying?
All that said, this raises another question -- we should probably make
it easier to set useMathText to True in the ScalarFormatter, either
through an rcParam or a kwarg somewhere. As it stands, it appears
(unless my grepping search has been wrong) the only way to get this
behavior is by modifying the matplotlib source. Not ideal ;)
Mike
Paul Novak wrote:
> Hello,
>
> Using the following simple script, the scientific notation used on the
> y-axis is missing a multiplication symbol, as seen in the figure. My
> matplotlibrc file consists of
>
> backend : GTKAgg
>
> and I am using SVN r6760.
>
> I found this when I was trying to change the ScalarFormatter to have
> useMathText = True by default, so the scientific notation would use a
> superscript and not '1e7'.
>
> Paul Novak
>
> ---
> import matplotlib.pyplot as plt
> import numpy as np
>
> t = np.arange(0.0, 4.0)
> s = 2.0e7*t
> plt.plot(t, s, linewidth=1.0)
>
> plt.xlabel(r'time (s)')
> plt.ylabel('voltage (mV)')
> plt.show()
>
>
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--
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA
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