A target zone is a color filled polygon horizontally or vertically painted across
the chart area. The goal of a target zone is to set upper and lower limits between
which a sequence of data points can be plotted and compared against delimiter
values. In this application we can see the heartbeat monitoring results of a person
who worked out for 30 minutes. The results are plotted against five ranges, each
one representing a target zone where different fitness levels can be achieved.
Graph data is read from an xml file, which is located in the applet codebase directory.
Move mouse cursor across the chart area to instantly display values associated with the
data points crossed by a scrolling bar. See page source for details.