Re: [Matplotlib-users] Displaying \frac{a}{b} in xlabel

[Darren D. <dd...@co...>]

>> On Wednesday 08 March 2006 5:06 am, Nils Wagner wrote:
>> =A0=20
>>> Hi all,
>>>
>>> How do I use \frac{a}{b} within labels ?
>>>
>>> from pylab import *
>>> from scipy import *
>>> x =3D linspace(0,pi,20)
>>> plot(x,sin(x))
>>> title(r'\frac{\Theta}{2\pi}')
>>> xlabel(r'\frac{\Theta}{2\pi}') =A0# The output is not o.k.
>>> show()
>>>
>>> Am I missing something or is it a bug ?
>>> =A0 =A0=20
>>
>> What does "The output is not o.k." mean?
>> =A0=20
> The output is somewhat like \Theta \frac{}{2\pi}
> If I use
> xlabel(r'$\frac{\Theta}{2\pi}$')
>
> it works fine.

This is not a bug. Please keep in mind that usetex is really only an interf=
ace=20
to latex. For problems specific to LaTeX, it would be best to consult the=20
appropriate sources or lists. As it happens, \frac is only allowed in math=
=20
mode. That it produced any output at outside of mathmode is a case of faili=
ng=20
silently.

Does anyone know how to catch exit status using os.popen and friends? LaTeX=
=20
would have returned an exit status of 1 for this example, which could be us=
ed=20
to raise a warning.

Darren