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The following types are available:
FL_BAR_CHART
FL_HORBAR_CHART
FL_LINE_CHART
FL_FILLED_CHART
FL_SPIKE_CHART
FL_PIE_CHART
FL_SPECIALPIE_CHART
A pie-chart with displaced first item
All charts except pie-charts can display positive and negative data.
Pie-charts will ignore values that are less then or equal to 0. The
maximum number of values displayed in the chart can be set using the
routine fl_set_chart_maxnumb()
. The argument must be not
larger than FL_CHART_MAX
which currently is 512. Switching
between different types can be done without any complications.