Book Image

gnuplot Cookbook

By : Lee Phillips
Book Image

gnuplot Cookbook

By: Lee Phillips

Overview of this book

gnuplot is the world's finest technical plotting software, used by scientists, engineers, and others for many years. It is in constant development and runs on practically every operating system, and can produce output in almost any format. The quality of its 3d plots is unmatched and its ability to be incorporated into computer programs and document preparation systems is excellent. gnuplot Cookbook ñ it will help you master gnuplot. Start using gnuplot immediately to solve your problems in data analysis and presentation. Quickly find a visual example of the graph you want to make and see a complete, working script for producing it. Learn how to use the new features in gnuplot 4.4. Find clearly explained, working examples of using gnuplot with LaTeX and with your own computer programming language. You will master all the ins and outs of gnuplot through gnuplot Cookbook. You will learn to plot basic 2d to complex 3d plots, annotate from simple labels to equations, integrate from simple scripts to full documents and computer progams. You will be taught to annotate graphs with equations and symbols that match the style of the rest of your text, thus creating a seamless, professional document. You will be guided to create a web page with an interactive graph, and add graphical output to your simulation or numerical analysis program. Start using all of gnuplot's simple to complex features to suit your needs, without studying its 200 page manual through this Cookbook.
Table of Contents (18 chapters)
gnuplot Cookbook
About the Author
About the Reviewers
Finding Help and Information

Plotting with pictures

A style, popular in journalism, for presenting a small set of data employs a technique illustrated in the following figure:

The previous figure shows the growth in warhead inventory of a fictional nation over time. A generic image of a bomb is scaled vertically to indicate the quantity for each year plotted.

Getting ready

The public domain bomb image that is used for the plot is called bomb.png and is provided in the datafiles folder for this chapter. You can modify this recipe to use your own pictures, in a variety of formats. To see which file types your version of gnuplot can use, type show datafile binary filetypes at the gnuplot interactive prompt. You will need to modify some of the parameters in the script to take into account the pixel dimensions of your image.

How to do it…

The following script produces the Elbonian bomb plot:

set title "Elbonian Warhead Inventory" font "Times,24" offset 0,2
set xlabel "Year" font "Times,12"
set xlabel "Year" font "Times,16"