The source code defines a class
PlotDemo derived from Plot. This class
contains a sequence of Java statements in its init()
method that configures and constructs the plot. This particular
example also demonstrates a number of features. In particular, the X
and Y ranges are given explicitly in the Java code, but note that the
Y (vertical) range is insufficient to contain all the points. The
lines are clipped at the boundary of the range. Clicking on the "fill"
button at the upper right brings all data within range. Note further
that the Y axis is labeled with explicitly given tick marks, this time
placed at non-integer positions, and again given string labels. Notice
also that the "impulses" or "stems" feature is turned on,
causing a line to drawn from each plotted point down to the x
axis. This is sometimes called a "stem plot;" it provides an
alternative way to explicitly show each sample being plotted
(vs. marks as in the marks demo).