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

Changing the point style

In this section, we extend the use of user styles introduced in the earlier recipe Styling your curves to defining user styles for markers for use with the linespoints type of plots introduced in the previous recipe.

How to do it…

There are some more style choices that can be made part of the user-defined linestyles when you are plotting using the linespoints style, which draws a series of markers, or "points", along the line. This works best with solid lines, as shown in the figure following the commands:

set term postscript landscape color solid  
set out ''
set key top left
set style function linespoints
set style line 1 lw 4 lc rgb '#990042' ps 2 pt 6 pi 5
set style line 2 lw 3 lc rgb '#31f120' ps 2 pt 12 pi 3
set style line 3 lw 3 lc rgb '#0044a5' ps 2 pt 9 pi 5
set style line 4 lw 4 lc rgb '#888888' ps 2 pt 7 pi 4
plot [0:1] x**0.5 ls 1, x ls 2, x**2 ls 3, x**3 ls 4

How it works…

The abbreviation ps stands for pointsize, which sets the size of the marker...