File:E12 values graph.svg

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E12_values_graph.svg‎ (SVG file, nominally 575 × 420 pixels, file size: 4 KB)

[edit] Summary

Description
English: Graph showing values of the E12 series, which is used to standardize values of resistors and capacitors. The values shown cover two decades of the series, from 1 to 82, and illustrates the exponential nature of the series.
Date

3 July 2008(2008-07-03)
Source

Own work by uploader, designed to replace original bitmap image Image:E12_values_graph.png
Author

Qef
Permission
(Reusing this image)		 See below.
Other versions Bitmap version showing same data but with superfluous labels, making it not language neurtral: Image:E12_values_graph.png

[edit] Licensing

PD-icon.svg This image has been released into the public domain by its author, Qef. This applies worldwide.

In some countries this may not be legally possible; if so:
Qef grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

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[edit] Source code

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"/>
 <g font-family="Bitstream Vera Sans" font-size="15">
$text_cmds
 </g>
</svg>
END

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current17:07, 3 July 2008Thumbnail for version as of 17:07, 3 July 2008575×420 (4 KB)Qef (Talk | contribs) ({{Information |Description={{en|1=Graph showing values of the E12 series, which is used to standardize values of resistors and capacitors. The values shown cover two decades of the series, from 1 to 82, and illustrates the exponential nature of the serie)

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