A range is a list of two numbers, the minimum and the maximum.
Ranges can be given explicity or computed in PostScript by
Returns the range of values in 2-dimensional array column k.
Expands range by p/100 on each end.
Expands range to round number of ticks.
Returns the minimal range covering all range1, range2, ...
x-range and y-range should each be a list of two numbers or the value returned
pagerect is the rectangle bounding the graph to be drawn; if missing, the
rectangle from the top of the PostScript stack is popped and used.
Based on the given ranges,
setup-plot sets up scaling and margins for making
a graph. The margins are sized proportional to the fontheight
value at the time of the call to setup-plot.
setup-plot sets two variables:
The region where data points will be plotted.
The pagerect argument to
setup-plot. Includes plotrect, legends, etc.