[Matplotlib-users] draw upper and lower limits

[Antonino C. <cuc...@as...>]

Hi,
I have some graphs with lower and upper limits. I found a couple of 
ideas online, but nothing like "plotting symbols" like arrows.
I am using the mathtex upperarrow symbol but it is quite unconfortable 
positioning the tex character in the righ X-Y position.
Do you know if there is an easier way to plot arrows as "markers"?

Thanks,
Nino

-- 

Antonino Cucchiara
PhD candidate
Department of Astronomy&Astrophysics
Penn State University
website: www.astro.psu.edu/~cucchiara/