Modularized interface to gnuplot that allows complex graphics and fine control of their components. It is designed for non-interactive use, e.g. scripts for plotting statistics.

The hierarchy of objects is as follows:

• Graph2D: A curve like a sine curve. Attributes of a graph are line type, thickness, color.
• Graph3D: A surface.
• Plot: An overlay of many curves. It is parametrized by the graph type (2D or 3D) in order to make sure, that only graphs of one type are overlayed and only according attributes can be accessed. You cannot generate plots or graphs alone, you can only generate plots containing graphs using the functions in Graphics.Gnuplot.Plot.TwoDimensional and Graphics.Gnuplot.Plot.ThreeDimensional. You can combine plots using the Monoid type class.
• Frame: Add options to a plot such as border, legend, title, label attributes. See Graphics.Gnuplot.Frame and Graphics.Gnuplot.Frame.OptionSet.
• MultiPlot: Arrange several frames in a matrix layout. See Graphics.Gnuplot.MultiPlot.

Although the Haskell wrapper shall save you from the burden of learning gnuplot script syntax, it happens frequently that people ask, how to express a certain gnuplot script using this package. Thus let's annotate the gnuplot script generated by Demo.multiplot2d in order to show, what belongs to where:

 # the terminal selection is part of the 'plot' command of this module
 set terminal x11
 # multiplot initialization belongs to MultiPlot - of course
 set multiplot layout 3, 5
 # hiding the names of the temporary files is a FrameOption
 unset key
 set xrange [-1.0:1.0]
 # this plot contains only one graph,
 # but several graphs could be given separated by commas
 plot "curve0.csv" using 1:2 with lines
 plot "curve1.csv" using 1:2 with lines
 plot "curve2.csv" using 1:2 with lines
 plot "curve3.csv" using 1:2 with lines
 plot "curve4.csv" using 1:2 with lines
 plot "curve5.csv" using 1:2 with lines
 plot "curve6.csv" using 1:2 with lines
 set xrange [-2.5:2.5]
 set yrange [-2.5:2.5]
 # this is a plot build from a Graph3D
 splot "curve7.csv" using 1:2:3 with pm3d
 set xrange [-1.0:1.0]
 set yrange [*:*]
 plot "curve8.csv" using 1:2 with lines
 plot "curve9.csv" using 1:2 with lines
 plot "curve10.csv" using 1:2 with lines
 plot "curve11.csv" using 1:2 with lines
 plot "curve12.csv" using 1:2 with lines
 plot "curve13.csv" using 1:2 with lines
 plot "curve14.csv" using 1:2 with lines
 unset multiplot