Ĉi tiu verko estis liberigita kiel publika havaĵo de ties aŭtoro, Qef. Tio aplikatas tutmonde. En iuj landoj tio povas esti laŭleĝe neebla; en tiu okazo: Qef donas al iu ajn la rajton uzi ĉi tiun verkon por iu ajn uzo, sen kondiĉoj, krom se tiuj kondiĉoj deviĝas per leĝo.

This graph was generated by the Perl program below, which was specially written for the purpose. If changes need to be made, it's probably best to tweak the program and re-run it to get a new version, rather than editing the SVG directly.

use warnings;
use strict;

# The E12 series twice over, the first time divided by 10.
my @VALUES = qw(
    1.0 1.2 1.5 1.8 2.2 2.7 3.3 3.9 4.7 5.6 6.8 8.2
    10  12  15  18  22  27  33  39  47  56  68  82
);

# Parameters to set appearance.
my $AXIS_HT = 400;
my $VERT_SCALE = 4.5;
my $BAR_WIDTH = 20;
my $BAR_GAP = 3;
my $MARGIN = 10;

my $img_wd = ($BAR_WIDTH + $BAR_GAP) * @VALUES + $BAR_GAP + 2 * $MARGIN;
my $img_ht = $AXIS_HT + 2 * $MARGIN;
my $margin_right = $img_wd - $MARGIN;
my $margin_bottom = $img_ht - $MARGIN;

my $x = $MARGIN;
my $graph_path = '';
my $text_cmds = '';
for (@VALUES) {
    $x += $BAR_GAP;
    my $bar_ht = $_ * $VERT_SCALE;
    $graph_path .= "M$x,$margin_bottom v-$bar_ht h$BAR_WIDTH v$bar_ht Z\n";
    $x += $BAR_WIDTH;
    my $bar_top = $img_ht - $bar_ht - $MARGIN + -5;
    my $txt_x = $x - 0.5 * $BAR_WIDTH + 4.5;
    $text_cmds .= "  <text transform='translate($txt_x,$bar_top) rotate(270)'" .
                  " x='0' y='0' fill='#000' text-anchor='start'>$_</text>\n";
}

print <<"END";
<?xml version="1.0" encoding="UTF-8"?>
<svg version="1.0" width="$img_wd" height="$img_ht"
     xmlns="http://www.w3.org/2000/svg">

 <defs>
  <linearGradient id="grad" x2="0%" y1="0%" y2="100%">
   <stop offset="5%" stop-color="#F00" />
   <stop offset="95%" stop-color="#F90" />
  </linearGradient>
 </defs>

 <path stroke="#000" stroke-width="1" fill="none"
       d="M$MARGIN,$MARGIN V$margin_bottom H$margin_right"/>
 <path stroke="#000" stroke-width="0.6" fill="url(#grad)" d="$graph_path"/>
 <path stroke="#333" stroke-width="0.6" fill="url(#grad)" d="$graph_path">
 </g>
</svg>
END