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

Avoiding overlapping labels

We devote our first recipe in this chapter to demonstrating several ways to avoid a common problem with gnuplot. As mentioned in previous chapters, gnuplot does not really try to account for the horizontal space occupied by tic labels, simply placing them at the tic positions and printing them in the selected tic font, whether that is the default or the one specified by the user.

This works acceptably well most of the time, but can fail spectacularly if our labels are long or we've chosen a big font. In these cases, the tic labels on the x-axis are in danger of overlapping. This is a particularly common problem when gnuplot is used to generate graphs automatically, where the user has no opportunity to tune each graph by hand.

In this recipe, we'll explore two ways to deal with long x-axis labels that don't require the use of tiny fonts to squeeze them in. The following figure shows the use of some very long numerical labels that are rotated to get them to fit, in...