Perl to call Gnuplot

1. Install Chart::Graph::Gnuplot

2. ~caidaperl/Chart-Graph-3.2/Graph/Gnuplot.pm

3. in Perl:

 use Chart::Graph::Gnuplot qw(&gnuplot);



 gnuplot(\%global_options, [\%data_set_options, \@matrix],
                           [\%data_set_options, \@x_column, \@y_column],
                           [\%data_set_options, < filename >], ... );

The following example illustrates most of the general capabilities of Chart::Graph::Gnuplot. It creates the output file gnuplot1.png. in the png graphics format. The data is coming from all three sources. The first data source is a matrix, the second is a column, and the last is an external data file.
  use Chart::Graph::Gnuplot qw(gnuplot);

  gnuplot({'title' => 'foo',
           'x2-axis label' => 'bar',
           'logscale x2' => '1',
           'logscale y' => '1',
           'output type' => 'png',
           'output file' => 'gnuplot1.png',
           'xtics' => [ ['small\nfoo', 10], ['medium\nfoo', 20], ['large\nfoo', 30] ],
           'ytics' => [10,20,30,40,50],
           'extra_opts' => 'set key left top Left'},
          [{'title' => 'data1',
            'type' => 'matrix'}, [[1, 10],
                                  [2, 20],
                                  [3, 30]] ],
          [{'title' => 'data2',
            'style' => 'lines',
            'type' => 'columns'}, [8, 26, 50, 60, 70],
                                  [5, 28, 50, 60, 70] ],
          [{'title' => 'data3',
            'style' => 'lines',
            'type' => 'file'}, './samplefile'],);