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

Writing a web GUI for gnuplot

This final recipe will teach you how to make your own interactive web application that uses gnuplot to draw a graph in response to user input. It is not a general-purpose GUI for gnuplot as was the subject of the previous recipe, but rather shows one way to use gnuplot as part of a special-purpose web application. Because gnuplot can be controlled through text commands and can create PNG files, which are size-efficient and well supported by current web browsers, it is very well suited to this type of project.

We are going to create a simple game that asks the user to hit a target with a cannonball. The player enters two numbers, the initial speed of the projectile and the angle of the cannon. After clicking on a button labeled fire!, a graph is displayed showing the trajectory of the cannonball calculated from the two input numbers and plotted by gnuplot. The player can repeatedly enter new numbers and fire, and each time the graph will be replaced. The game...