Book Image

GNU Octave Beginner's Guide

By : Jesper Schmidt Hansen
Book Image

GNU Octave Beginner's Guide

By: Jesper Schmidt Hansen

Overview of this book

Today, scientific computing and data analysis play an integral part in most scientific disciplines ranging from mathematics and biology to imaging processing and finance. With GNU Octave you have a highly flexible tool that can solve a vast number of such different problems as complex statistical analysis and dynamical system studies.The GNU Octave Beginner's Guide gives you an introduction that enables you to solve and analyze complicated numerical problems. The book is based on numerous concrete examples and at the end of each chapter you will find exercises to test your knowledge. It's easy to learn GNU Octave, with the GNU Octave Beginner's Guide to hand.Using real-world examples the GNU Octave Beginner's Guide will take you through the most important aspects of GNU Octave. This practical guide takes you from the basics where you are introduced to the interpreter to a more advanced level where you will learn how to build your own specialized and highly optimized GNU Octave toolbox package. The book starts by introducing you to work variables like vectors and matrices, demonstrating how to perform simple arithmetic operations on these objects before explaining how to use some of the simple functionality that comes with GNU Octave, including plotting. It then goes on to show you how to write new functionality into GNU Octave and how to make a toolbox package to solve your specific problem. Finally, it demonstrates how to optimize your code and link GNU Octave with C and C++ code enabling you to solve even the most computationally demanding tasks. After reading GNU Octave Beginner's Guide you will be able to use and tailor GNU Octave to solve most numerical problems and perform complicated data analysis with ease.
Table of Contents (15 chapters)
GNU Octave
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface

The pois-solv package


We can now gather the four functions cmat_1d, cmat_2d, vecmat_convert, and pois_fd into an Octave package. There are a few advantages of packing the functions together rather than just copying the individual m-files:

  • The files are archived into single standard file format.

  • You can install the package easily with the pkg command, load and unload the functions, and not be concerned with where the functions are located (that is, if they are in the Octave search path).

  • With the package, you can add any relevant information about the functionality.

  • You can upload the package to Octave-Forge.

There are a few things we need to do in order to package the functions properly.

Organizing files into the package directory

First you will need a package directory—we will call this directory poissolv1, but you can call it whatever you want. Inside the package directory, we have the following files and directory:

  1. 1. The DESCRIPTION file: this text file contains a description of the package...