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.\" ========================================================================
.\"
.IX Title "TUTORIALS 1p"
.TH TUTORIALS 1p "2023-06-17" "perl v5.36.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
PDL::Tutorials \- A guide to PDL's tutorial documentation.
.SH "MIGRATION"
.IX Header "MIGRATION"
These are our migration guides for users familiar with other types
of numerical analysis software.
.IP "\s-1PDL::MATLAB\s0" 5
.IX Item "PDL::MATLAB"
Migration guide for \s-1MATLAB\s0 users. This page explains the key differences
between \s-1MATLAB\s0 and \s-1PDL\s0 from the point of view of a \s-1MATLAB\s0 user.
.IP "PDL::Scilab" 5
.IX Item "PDL::Scilab"
Migration guide for Scilab users. This page explains the key differences
between Scilab and \s-1PDL\s0 from the point of view of a Scilab user.
.SH "FOUNDATION"
.IX Header "FOUNDATION"
.IP "PDL::Philosophy" 5
.IX Item "PDL::Philosophy"
Why did we write \s-1PDL\s0? This document explains some of the history and
motivation behind the Perl Data Language. It is an attempt to answer
the question \*(L"Why \s-1PDL\s0?\*(R".
.IP "PDL::QuickStart" 5
.IX Item "PDL::QuickStart"
Quick introduction to \s-1PDL\s0 features. A hands-on guide suitable for
complete beginners. This page assumes no previous knowledge of Perl
or \s-1PDL.\s0
.IP "PDL::Indexing" 5
.IX Item "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
\&\*(L"indexing\*(R" and \*(L"slicing\*(R" and how they form the core of numerical
analysis with \s-1PDL.\s0
.SH "INTERMEDIATE"
.IX Header "INTERMEDIATE"
.IP "PDL::Broadcasting" 5
.IX Item "PDL::Broadcasting"
\&\fBBroadcasting\fR is one of \s-1PDL\s0's most powerful features. If you know \s-1MATLAB,\s0
you've heard of \*(L"vectorizing\*(R". Well, \fBbroadcasting\fR is like \*(L"vectorizing on
steroids\*(R". It lets you make very fast and compact code by avoiding
nested loops. All vector-based languages do this, but \s-1PDL\s0 generalizes
the technique to all sorts of applications.
.Sp
This tutorial introduces \s-1PDL\s0's broadcasting feature, and it shows an example
implementing Conway's Game of Life in 10 lines and 80 times faster than
a classical implementation.
.IP "PDL::BadValues" 5
.IX Item "PDL::BadValues"
Sometimes it is useful to specify that a certain value is \*(L"bad\*(R" or
\&\*(L"missing\*(R". Scientific instruments some times include portions of
invalid data. For example, a \s-1CCD\s0 camera might produce an image with
over-exposed pixels. \s-1PDL\s0's \*(L"bad values\*(R" feature gives you an easy way
to deal with this sort of imperfect data.
.IP "PDL::Tips" 5
.IX Item "PDL::Tips"
Tips and suggestions for using \s-1PDL.\s0 This page is an assorted collection
of programming tidbits that some \s-1PDL\s0 users have found useful. Some of
these tips might be of help when you write your programs.
.SH "ADVANCED"
.IX Header "ADVANCED"
.IP "\s-1PDL::PP\s0" 5
.IX Item "PDL::PP"
\&\s-1PDL\s0's Pre-Processor is one of \s-1PDL\s0's most powerful features. You
write a function definition in special markup and the preprocessor
generates real C code which can be compiled. With \s-1PDL:PP\s0 you get the
full speed of native C code without having to deal with the full
complexity of the C language.
.IP "\s-1PDL::API\s0" 5
.IX Item "PDL::API"
A simple cookbook explaining how to create ndarray manually, either
from Perl or from C/XS code. This page covers the \s-1PDL\s0 core routines
that comprise the \s-1PDL API.\s0 If you need to access ndarrays from C/XS,
this is the document for you.
.IP "PDL::Internals" 5
.IX Item "PDL::Internals"
Description of the inner workings of the \s-1PDL\s0 module. Very few people
need to see this. This page is mainly for \s-1PDL\s0 developers, or people
interested in debugging \s-1PDL\s0 or changing the internals of \s-1PDL.\s0 If you
can read this document and understand all of it, and you additionally
understand \s-1PDL::PP\s0, you will be awarded the title of
\&\*(L"\s-1PDL\s0 Guru\*(R".
.SH "COPYRIGHT"
.IX Header "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.
.PP
See: http://dev.perl.org/licenses/