File:US first-class postage stamp rates.svg

[edit] Summary

[edit] Licensing

I, the copyright holder of this work, hereby publish it under the following license: Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue

[edit] gnuplot code

The following is the gnuplot code to generate this plot. Additional processing was done in inkscape to tidy up the label font sizes, force a white background, and center the title to satisfy the mediawiki rendering engine. The gnuplot code is released under both GFDL and GPL, take your pick.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue

	This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
	You are free: to share – to copy, distribute and transmit the work to remix – to adapt the work Under the following conditions: attribution – You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). share alike – If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one.
	This licensing tag was added to this file as part of the GFDL licensing update.www.creativecommons.org/licenses/by-sa/3.0/CC-BY-SA-3.0Creative Commons Attribution-Share Alike 3.0 truetrue

This work is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or any later version. This work is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. See version 2 and version 3 of the GNU General Public License for more details.www.gnu.org/licenses/gpl.htmlGPLGNU General Public Licensetruetrue

# Save as an SVG
set terminal svg size 600 500

# Set the title
set title "US Postage Stamp Rates"

# Modify the x-axis
set xlabel "Date"
set xdata time
set timefmt "%m/%d/%Y"
set xtics rotate ('1/1/1880', '1/1/1890', '1/1/1900', '1/1/1910', '1/1/1920', '1/1/1930', '1/1/1940', '1/1/1950', '1/1/1960', '1/1/1970', '1/1/1980', '1/1/1990', '1/1/2000', '1/1/2010')
set format x "%m/%d/%Y"
set xrange ['1/1/1875':'1/1/2015']

# Modify the y-axis
set ylabel "Price (US Dollars)"
set format y "$%.2f"

# Output file
set output "plot.svg"

# Push key to top-left
set key top left

# Ready, set, plot!
plot "data.txt" using 1:2 title 'Issued Rates' with steps, \
   "data.txt" using 1:3 title 'Adjusted Rates (1984 Dollars)' with steps

[edit] Source data

This source data was taken from History of United States Postal Service rates (exact revision used)

# Date                 Price           Adjusted price to 1984 dollars
7/1/1885               0.02            0.20
11/3/1917              0.03            0.23
7/1/1919               0.02            0.12
7/6/1932               0.03            0.23
1/1/1952               0.03            0.11
8/1/1958               0.04            0.14
1/7/1963               0.05            0.16
1/7/1968               0.06            0.17
5/16/1971              0.08            0.20
3/2/1974               0.10            0.20
9/14/1975              0.10            0.19
12/31/1975             0.13            0.24
5/29/1978              0.15            0.23
3/22/1981              0.18            0.20
11/1/1981              0.20            0.22
2/17/1985              0.22            0.20
4/3/1988               0.25            0.21
2/3/1991               0.29            0.21
1/1/1995               0.32            0.21
1/10/1999              0.33            0.20
1/7/2001               0.34            0.19
6/30/2002              0.37            0.21
1/8/2006               0.39            0.20
5/14/2007              0.41            0.21

This vector image was created with gnuplot.

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

	Date/Time	Thumbnail	Dimensions	User	Comment
current	03:56, 13 May 2007		600 × 500 (16 KB)	Cburnett	Forced background to white, attempt to center title
	03:54, 13 May 2007		600 × 500 (16 KB)	Cburnett	{{Information |Description={{en|Time plot of prices of US first-class postage stamps.}} |Source=Own work |Date=May 12, 2007 |Author=en:User:Cburnett |Permission=GFDL |other_versions= }}

• User:Cburnett/GFDL images