a simple tool for plotting data values to a device context.
The points field contains the data values to plot, and
connected? indicates whether the points are connected by a
line. The pen field provides a pen for plotting
points/lines. The remaining fields determine the plotting area within
a drawing context.
Configures a plot. The grid? field determines whether to draw
a grid at axis markings, and the x-axis-marking and
y-axis-marking lists supply locations for marks on each
axis. The other fields are self-explanatory.
Draws the data-set
s in data
into the given
. Uses drawing-context coordinates in data-set
that will accommodate all of the data sets.