GUI Library for Visualizing Data

[Peter Simons]

Hi,

the Haskell language is fairly new to me, so please pardon me if this
is a frequently asked question, but I wasn't able to find an answer
myself.

I'm looking for a library that allows me to visualize data under X11
screen, for instance as a pie chart or as a bar chart. I seem to
recall that something like that was available for the GTK toolkit, but
has this library been ported to Haskell? Or any other library?

I'd appreciate any pointers!

        -peter