This program reads the parallel coordinate plot produced by arffToPcp and generates
the plot in the form of an image file. It uses IDL to actually plot the data.
A parallel coordinate plot [11] is 2D display of multidimensional data. Data
with any number of attributes can be represented. Each attribute dimension is
represented by an axis, but unlike the standard representation in which the axes
are placed at right angles to one another, in parallel coordinates the axes are all
parallel to one another. Figure 3.1 is an example of a parallel coordinate plot.