This example demonstrates the following basic steps in creating a bar chart:
- Create a XYChart object using XYChart.XYChart.
- Specify the plot area of the chart using XYChart.setPlotArea. The plot area is the rectangle bounded by the x and y axes. You should leave some margin on the outside of the plot area for axis labels, chart titles, etc.
- Specify the labels on the x-axis using Axis.setLabels.
- Add a bar layer and specify the data for the bars using XYChart.addBarLayer.
- Generate the chart using BaseChart.makeChart2.
[File: perldemo/simplebar.pl] (The CGI version is available as "perldemo_cgi/simplebar.pl".)
#!/usr/bin/perl
use perlchartdir;
#The data for the bar chart
my $data = [85, 156, 179.5, 211, 123];
#The labels for the bar chart
my $labels = ["Mon", "Tue", "Wed", "Thu", "Fri"];
#Create a XYChart object of size 250 x 250 pixels
my $c = new XYChart(250, 250);
#Set the plotarea at (30, 20) and of size 200 x 200 pixels
$c->setPlotArea(30, 20, 200, 200);
#Add a bar chart layer using the given data
$c->addBarLayer($data);
#Set the x axis labels using the given labels
$c->xAxis()->setLabels($labels);
#output the chart
$c->makeChart("simplebar.png")
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