PDL::Tutorials (1)

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NAME

PDL::Tutorials - A guide to PDL's tutorial documentation.

MIGRATION

These are our migration guides for users familiar with other types of numerical analysis software.

PDL::MATLAB

Migration guide for

MATLAB

users. This page explains the key differences between

MATLAB

and

PDL

from the point of view of a

MATLAB

user.

PDL::Scilab

Migration guide for Scilab users. This page explains the key differences between Scilab and

PDL

from the point of view of a Scilab user.

FOUNDATION

PDL::Philosophy

Why did we write

PDL

? This document explains some of the history and motivation behind the Perl Data Language. It is an attempt to answer the question ``Why

PDL

?''.

PDL::QuickStart

Quick introduction to

PDL

features. A hands-on guide suitable for complete beginners. This page assumes no previous knowledge of Perl or

PDL.

PDL::Indexing

After you have read the QuickStart guide, you should follow up with this document. This guide goes more deeply into the concepts of ``indexing'' and ``slicing'' and how they form the core of numerical analysis with

PDL.

INTERMEDIATE

PDL::Threading

Threading is one of

PDL

's most powerful features. If you know

MATLAB,

you've heard of ``vectorizing''. Well, threading is like ``vectorizing on steroids''. It lets you make very fast and compact code by avoiding nested loops. All vector-based languages do this, but

PDL

generalizes the technique to all sorts of applications.

This tutorial introduces

PDL

's threading feature, and it shows an example implementing Conway's Game of Life in 10 lines and 80 times faster than a classical implementation.

PDL::BadValues

Sometimes it is useful to specify that a certain value is ``bad'' or ``missing''. Scientific instruments some times include portions of invalid data. For example, a

CCD

camera might produce an image with over-exposed pixels.

PDL

's ``bad values'' feature gives you an easy way to deal with this sort of imperfect data.

PDL::Tips

Tips and suggestions for using

PDL.

This page is an assorted collection of programming tidbits that some

PDL

users have found useful. Some of these tips might be of help when you write your programs.

ADVANCED

PDL::PP

PDL

's Pre-Processor is one of

PDL

's most powerful features. You write a function definition in special markup and the preprocessor generates real C code which can be compiled. With

PDL:PP

you get the full speed of native C code without having to deal with the full complexity of the C language.

PDL::API

A simple cookbook explaining how to create piddle manually, either from Perl or from C/XS code. This page covers the

PDL

core routines that comprise the

PDL API.

If you need to access piddles from C/XS, this is the document for you.

PDL::Internals

Description of the inner workings of the

PDL

module. Very few people need to see this. This page is mainly for

PDL

developers, or people interested in debugging

PDL

or changing the internals of

PDL.

If you can read this document and understand all of it, and you additionally understand

PDL::PP

, you will be awarded the title of ``

PDL

Guru''.

COPYRIGHT

Copyright 2010 Daniel Carrera (dcarrera@gmail.com). You can distribute and/or modify this document under the same terms as the current Perl license.

See: dev.perl.org/licenses