in reply to GD::Graph set_legend problem

It sounds like you are trying to plot twice. Does this example help? 
#!/usr/bin/perl
use warnings;
use strict;
use GD;
use GD::Graph::lines;

my @data = ( [1, 2, 3, 4, 5, 6, 7, 8, 9,],
[ 8, 8.25, 8.5, 8.35, 8.76, 8.21, 8.6, 8.8, 8.5],
[ 57.4, 57.6, 57.8, 57.9, 57.4, 58.5, 57, 57.87, 58.34] );

my $my_graph = new GD::Graph::lines (600, 400);

$my_graph->set(
title => "My Graph",
    transparent   => '0',
    bgclr         => 'lgray',
    boxclr        => 'white',
    fgclr         => 'white',
    title         => 'Some simple graph',
    x_label => 'X axis label',
    y1_label => 'Y1 axis label',
    y2_label => 'Y2 axis label',
    #boxclr => '#C0C0C0',
    two_axes => 1,
);

$my_graph->set_legend("data set 1", "data set 2");

my $gd = $my_graph->plot(\@data) or die $my_graph->error;
open(IMG, ">$0.png") or die $!;
binmode IMG;
print IMG $gd->png;
close IMG;

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Re^2: GD::Graph set_legend problem
by yelekeri (Novice) on Jul 19, 2006 at 17:14 UTC

    I think you are right, there is two "plot"s, but I never noticed till I add set_legend, take a look at this code. 

    #!D:\\tools\\Perl\\bin\\perl.exe
use CGI;
use GD::Graph::Data;
use GD::Graph::bars;
use GD;

  $q = new CGI;

  my $data = GD::Graph::Data->new();

  @data = ( [qw(Env)], [12] , [4]);

  # And we quickly need to do some manipulations on that
  my $data = GD::Graph::Data->new();
  $data->copy_from(\@data);

  my $chart = GD::Graph::bars->new();
  
  $chart->set_x_axis_font(gdMediumBoldFont);  # to display environment
  $chart->set_y_axis_font(gdMediumBoldFont); 
  $chart->set_title_font(gdGiantFont);
  $chart->set_x_label_font(gdGiantFont);
  $chart->set_y_label_font(gdGiantFont);

  $chart->set(x_label => "Environment" , 
            y_label => "count",
        title => "Migration count per environment",
        bar_spacing => 20,
        shadow_depth => 5,
        long_ticks => 0,    # this is for horizontal and vertical line
+s, 
        dclrs => [qw (lgreen lblue lred)], 
        show_values => 1
      );
  $chart->set_legend_font(GD::gdMediumBoldFont);
  $chart->set_legend("ACPT","PROD");
  ################### This is the code I just commented ###
  ### but even with this it was drawing only once. 
  # my $gd = $chart->plot($data);

 print $q->header('image/png');  
 binmode STDOUT;  
 print STDOUT $chart->plot(\@data)->png;

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    Edited by planetscape - added code tags

    Read more... view votes (25 Bytes)

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