A simple plotting library for Haskell, using gnuplot for rendering.
Developed and tested using Mac OS X 10.7.3 with gnuplot 4.4 (via MacPorts). Compiles using GHC 7.0.4
A simple wrapper to the gnuplot command line utility. Make sure gnuplot is in your path and everything should work.
Typically you will invoke a plot like so:
plot X11 $ Data2D [Title "Sample Data"]  [(1, 2), (2, 4), ...]
To plot a function, use the following:
plot X11 $ Function2D [Title "Sine and Cosine"]  (\x -> sin x * cos x)
There is also a shortcut available - the following plots the sine function:
plot X11 sin
Output can go into a file, too (See TerminalType):
plot (PNG "plot.png") (sin . cos)
Haskell functions are plotted via a set of tuples obtained form the function. If you want to make use of gnuplots mighty function plotting functions you can pass a Gnuplot2D or Gnuplot3D object to plot.
plot X11 $ Gnuplot2D [Color Blue]  "2**cos(x)"
For 3D-Plots there is a shortcut available by directly passing a String:
plot X11 "x*y"
Multiple graphs can be shown simply by passing a list of these:
plot X11 [ Data2D [Title "Graph 1", Color Red]  [(x, x ** 3) | x <- [-4,-3.9..4]] , Function2D [Title "Function 2", Color Blue]  (\x -> negate $ x ** 2) ]
For 3D Graphs it is useful to be able to interact with the graph (See plot' and GnuplotOption):
plot' [Interactive] X11 $ Gnuplot3D [Color Magenta]  "x ** 2 + y ** 3"
If you want to know the command that SimplePlot uses to plot your graph, turn on debugging:
plot' [Debug] X11 $ Gnuplot3D [Color Magenta]  "x ** 4 + y ** 3" > set term x11 persist; splot x ** 4 + y ** 3 lc rgb "magenta"