4 use List::Util qw( max sum );
8 use Getopt::Long '2.33';
9 sub podexit { require Pod::Usage; Pod::Usage::pod2usage(-exitval => 0, @_) }
12 'usage|h' => sub { podexit() },
13 'help' => sub { podexit(-verbose => 2) },
14 ) or exit 64; # EX_USAGE
15 $opt{width} ||= $ENV{COLUMNS} || 80;
17 my @lines = readline or exit;
19 my @values = map { s/^\h*([0-9]*)// and $1 } @lines;
20 my @order = sort { $b <=> $a } @values;
21 my $lenval = 1 + int log($order[0]) / log 10; # max string length
22 my $len = 1 + max map { length } @lines; # left padding
23 my $size = ($opt{width} - $lenval - $len) / $order[0]; # bar multiplication
25 sub orderpos { ($order[$_[0]] + $order[$_[0] + .5]) / 2 * $size }
27 $barmark[ sum(@values) / @values * $size ] = '='; # average
28 $barmark[ orderpos($#order / 2) ] = '+'; # mean
29 defined and $_ = "\e[36m$_\e[0m" for @barmark;
31 for my $nr (0 .. $#lines) {
32 my $val = $values[$nr];
34 $val == $order[0] ? 32 : # max
35 $val == $order[-1] ? 31 : # min
37 printf "\e[%sm", $color if $color;
38 printf "%*s", $lenval, $val;
39 print "\e[0m" if $color;
40 printf '%-*s', $len, $lines[$nr];
41 print $barmark[$_] // '-' for 1 .. $val * $size;
49 graph - append bar chart to input numbers
53 B<graph> [<options>] [<input>]
55 cat ... | uniq -c | graph
59 Each line starting with a number is given a bar to visualise relative sizes.
65 =item -w, --width=<columns>
67 Override the maximum number of columns to use.
68 Appended graphics will extend to fill up the entire screen.
74 Mischa POSLAWSKY <perl@shiar.org>