use GD::Graph::lines;
use GD::Graph::Map;

@data = ( 
     [ qw( Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec) ],
     [ reverse(4, 3, 5, 6, 3,  1.5, -1, -3, -4, -6, -7, -8)],
     [        (4, 3, 5, 6, 3,  1.5, -1, -3, -4, -6, -7, -8)],
     [        (2, 2, 2, 5, 5,  4.5,1.5,  2,  3,  5,  4,  3)],
);

[download]
Instead of sticking with the hardcoded values above, I would like to read in the data from different files. ( data in a comma delimited format )

eg.

10,20,30,40 
open IN, "<header_data.dat";
@myheader = <IN>;
close IN;

open IN, "<daily_data1.dat";
@mydata1 = <IN>;
close IN;

open IN, "<daily_data2.dat";
@mydata2 = <IN>;
close IN;

open IN, "<daily_data3.dat";
@mydata3 = <IN>;
close IN;

[download]
Once the data is in the arrays, I should be able to just push the exisiting arrays
onto @data inorder to plot it. I do not understand what kind of data is used by
@data ( array of refs or array of scalar values ).

How do I store the incomming data inorder to plot it ?

$my_graph = new GD::Graph::lines();

$my_graph->set( 
        x_label => 'Month',
        y_label => 'Measure of success',
        title => 'A Multiple Line Graph',

        y_max_value => 8,
        y_min_value => -8,
        y_tick_number => 16,
        y_label_skip => 2,
        box_axis => 0,
        line_width => 3,
        zero_axis_only => 1,
        x_label_position => 1,
        y_label_position => 1,

        x_label_skip => 3,
        x_tick_offset => 2,
);

$my_graph->set_legend("Us", "Them", "Others");

open PNG, ">sample52.png";
binmode PNG; #only for Windows like platforms
print PNG ($my_graph->plot(\@data))->png;
close PNG;

$map = new GD::Graph::Map($my_graph, info => '%l');
$HTML = $map->imagemap("sample52.png", \@data);

__END__

[download]

In reply to Graphing basics.. by Anonymous Monk

Title:
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