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

Adding minor tics

Here is a simple plot with some extra elements that we haven't seen before. There are smaller tic marks between the major, labeled tic marks. These are referred to as minor tics. There is also a grid of dotted lines covering the graph, with the grid lines aligned with the major tic marks.

How to do it…

The following script will create the previous figure:

set grid
set mxtics 4
set mytics 2
plot [0:2*pi] sin(12*x)*exp(-x/4)

How it works…

The new commands are in the highlighted lines. set grid causes the light grid lines to appear when we finally issue the plot command. The second and third lines create minor tics on the axes. mxtics sets the minor tics on the x-axis and mytics creates minor tics on the y-axis. The number following the keyword (mxtics or mytics) sets the number of spaces between tics rather than the actual number of minor tics. Examining the figure should make it clear how this works. The purpose of minor tics is to make it easier for the reader to extract quantitative...