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Graph displaying reputation of all your nodes

by tomhukins (Curate)
on Oct 22, 2001 at 18:56 UTC ( #120545=sourcecode: print w/replies, xml ) Need Help??
Category: PerlMonks Related Scripts
Author/Contact Info Tom Hukins (tomhukins) <>
Description: Converts output from into a PNG bar chart to show how many of your nodes have a given reputation.
#!/usr/bin/perl -Tw

# Converts output from
# <> into a PNG bar chart 
# show how many of your nodes have a given reputation
# Tom Hukins <> (tomhukins on Perl Monks) - 20011022
# This program is free software; you can redistribute it and/or modify
# it under the same terms as Perl itself

use strict;

use GD::Graph::bars ();
use XML::Simple qw(XMLin);

    # Allow the user to specify an alternative output filename on the
    # command line
    my $output_filename = shift || 'quickrep.png';

    my($ratings, $username) = &derive_stats();
    &draw_graph($ratings, $username, $output_filename);

sub derive_stats {
    my $xml = XMLin('./quickrep.xml') or die "$!";

    my $username = $xml->{INFO}{foruser};

    my @ratings; # Counts the number of nodes with a given rating
    while (my($id, $node) = each %{ $xml->{NODE} }) {
        @ratings[ $node->{reputation} ]++;

    my $max_reputation = scalar(@ratings) - 1;
    return([ [0..$max_reputation], [@ratings] ], $username);

sub draw_graph {
    my($ratings, $username, $output_filename) = @_;
    my $graph = new GD::Graph::bars( 600, 400 );
        x_label => 'Reputation',
        y_label => 'Number of Nodes',
        title => "PerlMonks Nodes by Reputation for $username"
    ) or die "$!";
    my $gd = $graph->plot( $ratings );

    open(IMG, ">$output_filename") or die "$!";
    binmode IMG;
    print IMG $gd->png;
    close IMG;
Replies are listed 'Best First'.
Re: Graph displaying reputation of all your nodes
by patgas (Friar) on Oct 23, 2001 at 00:05 UTC

    I'm honored someone would build onto my little script... especially with something as cool as this. ++!

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Node Type: sourcecode [id://120545]
[Dumu]: hello jedikaiti
[Dumu]: got it. Anyway. Perl question. Can you use binmode more than once with an open filehandle to read a file first in binary mode, then in utf8 mode?
[ambrus]: Dumu: you can use binmode multiple times, but mostly at the start before you read things. it would be strange to change the io layers after you've already read things, and might not work too well.
[ambrus]: Dumu: why would you want to read the same file both in binary mode and utf8 mode?
[Corion]: Dumu: Yes, but switching needs to be done with caution, as you might read half an UTF-8 character in binary mode, and then switch to utf8 mode...
[Corion]: Personally, I would do the decoding of data in the program and not in the filehandle

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