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

Softening the axes

The default gnuplot style gives roughly equal visual prominence to both the axes and tics and to the actual curves being plotted. Some may prefer the aesthetic properties of the style of plot illustrated in the following figure. In this graph, the curve is made to stand out by rendering the tics labels, border, and background grid in a lighter shade and using a thicker line for the curve:

How to do it…

Load the following script into gnuplot to see the result:

set style line 2 lc rgb '#999999' lt 0 #grid
set style line 1 lc rgb '#999999' lt 1 #border
set grid linestyle 2
set border linestyle 1
plot sin(x)/x lw 2

How it works…

The set border and set grid commands accept a linestyle (see Chapter 3, Applying Colors and Styles). We've defined two styles, both with a mid-gray color. The linestyle for the grid will use linetype (lt) 0, which is dotted in most terminals, and that for the border will use linetype (lt) 1, which is solid. After defining these styles, we can use them in...