[Matplotlib-users] latex label using string variable

[manouchk <man...@gm...>]

Hi,

My little problem is simple. I want to use a variable to define labels on a 
graph. If I want to create a fraction, I have to use function \frac but when 
I do that :
ylab="$RRR [\frac{R(300K)}{R(10K)}]$"
The value stored in ylab is :
'$RRR [\x0crac{R(300K)}{R(10K)}]$'

So how to put "\f" in a variable in python?