So, I'm still plugging away to see why my arrays won't graph, and I ran into something that's rather curious to me, and I can't see where the issue lies.

The following code creates a small graph with three lines plotted: 

use GD::Graph::lines;


$Group = "Test Group";

#@name1 = ;
#@name2 = ;
#@name3 = ;
#@xaxis = ;


@data = (
    [1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
    [6, 18, 21, 28, 36, 44, 52, 67, 78, 89],
    [1, 15, 22, 31, 45, 7, 19, 21, 36, 41],
    [8, 91, 78, 88, 87, 80, 96, 95, 99, 99]
    );
@userlist2 = "";
$name1 = "John";
$name2 = "Jacob";
$name3 = "Jingleheimer";
$space = " ";
push (@userlist2, $name1);
push (@userlist2, $name2);
push (@userlist2, $name3);
push (@userlist2, $space);           
           
           
           
           
           $graph1 = GD::Graph::lines->new(1024, 768);
            $graph1->set( 
            x_label           => 'Date',
            y_label           => '% Closed',
            title             => "$Group",
            y_max_value       => 100,
            y_tick_number     => 10,
            x_label_skip      => 7 
            ) or die $graph->error;
            
            $graph1->set( dclrs => [ qw(black dblue gold dgreen dred d
+purple lorange dpink marine cyan dbrown lgray lblue lyellow dyellow l
+green lred lpurple pink ) ] );
            $graph1->set( line_types => [1, 3] );
            $graph1->set_legend(@userlist2);
            my $gd = $graph1->plot(\@data) or die $graph1->error;
            
           open (IMG, ">./$Group.jpg");
            binmode IMG;
            print IMG $gd->png;
            close IMG;

[download]

It creates the graph just fine, with the small problem that it only displays the first two entries for the legend, and doesn't seem to display the third. I can't really figure that part out. :-/

This is the altered code, which only changes in that instead of hardcoding the array directly, we reference three already-declared arrays to draw, and get no linear output when the graph is created. 

use GD::Graph::lines;


$Group = "Test Group";

@name1 = [6, 18, 21, 28, 36, 44, 52, 67, 78, 89];
@name2 = [1, 15, 22, 31, 45, 7, 19, 21, 36, 41];
@name3 = [8, 91, 78, 88, 87, 80, 96, 95, 99, 99];
@xaxis = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];


@data = (
    [@xaxis],
    [@name1],
    [@name2],
    [@name3]
    );
@userlist2 = "";
$name1 = "John";
$name2 = "Jacob";
$name3 = "Jingleheimer";
$space = " ";
push (@userlist2, $name1);
push (@userlist2, $name2);
push (@userlist2, $name3);
push (@userlist2, $space);           
           
           
           
           
           $graph1 = GD::Graph::lines->new(1024, 768);
            $graph1->set( 
            x_label           => 'Date',
            y_label           => '% Closed',
            title             => "$Group",
            y_max_value       => 100,
            y_tick_number     => 10,
            x_label_skip      => 7 
            ) or die $graph->error;
            
            $graph1->set( dclrs => [ qw(black dblue gold dgreen dred d
+purple lorange dpink marine cyan dbrown lgray lblue lyellow dyellow l
+green lred lpurple pink ) ] );
            $graph1->set( line_types => [1, 3] );
            $graph1->set_legend(@userlist2);
            my $gd = $graph1->plot(\@data) or die $graph1->error;
            
           open (IMG, ">./$Group.jpg");
            binmode IMG;
            print IMG $gd->png;
            close IMG;

[download]
This leads me to believe I've been doing something wrong in GD::Graph the entire time I've been working with it (and my boss, who taught me, before me). Can anyone who's even remotely more involved than I am give me an idea of what's going wrong there?

In reply to Curious issue with Graphing Arrays by SoaponaRope

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