[Haskell-beginners] gnuplot problem in ghci

[Scott N. Walck]

Hello,

I've used the gnuplot package

http://hackage.haskell.org/package/gnuplot

before with great satisfaction.  Now I have a new computer
(a Lenovo T400 with ubuntu 9.10) and I have a problem.
After I make a plot in ghci, using a command such as

plotFunc [] [0.0,0.1..10.0] cos

shown below, the keyboard no longer echos my input to
ghci.  ghci will still do what I ask, as in computing 3+4
below, but I could not see the "3+4" until after I hit
return.

This is gnuplot 0.3.4.

Could anyone suggest an idea?

Thanks,

Scott



walck at walck-nsf:~/courses/phy261/code$ gnuplot --version
gnuplot 4.2 patchlevel 5 
walck at walck-nsf:~/courses/phy261/code$ ghci
GHCi, version 6.12.1: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package ffi-1.0 ... linking ... done.
Prelude> :m +Graphics.Gnuplot.Simple
Prelude Graphics.Gnuplot.Simple> plotFunc [] [0.0,0.1..10.0] cos
Loading package syb-0.1.0.2 ... linking ... done.
Loading package base-3.0.3.2 ... linking ... done.
Loading package array-0.3.0.0 ... linking ... done.
Loading package containers-0.3.0.0 ... linking ... done.
Loading package monoid-transformer-0.0.2 ... linking ... done.
Loading package old-locale-1.0.0.2 ... linking ... done.
Loading package filepath-1.1.0.3 ... linking ... done.
Loading package old-time-1.0.0.3 ... linking ... done.
Loading package unix-2.4.0.0 ... linking ... done.
Loading package directory-1.0.1.0 ... linking ... done.
Loading package process-1.0.1.2 ... linking ... done.
Loading package time-1.1.4 ... linking ... done.
Loading package utility-ht-0.0.5.1 ... linking ... done.
Loading package gnuplot-0.3.4 ... linking ... done.
Prelude Graphics.Gnuplot.Simple> 3+4
7
Prelude Graphics.Gnuplot.Simple> 

-- 
Scott N. Walck
Associate Professor of Physics
Lebanon Valley College
Annville, PA 17003
phone: 717-867-6153
fax:   717-867-6075
email: walck at lvc.edu