lwp-request, GET, POST, HEAD – Simple command line user agent Synopsis lwp-request [-afPuUsSedvhx] [-m method] [-b base URL] [-t timeout] [-i if-modified-since] [-c content-type] [-C credentials] [-p proxy-url] [-o format] url… Description This program can be used to send requests to WWW servers and your local file system. The request content for POST and PUT methods is read from stdin. The content of the…
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….
PDL::Tips – Small tidbits of useful arcana. Programming tidbits and such. Synopsis use PDL; # Whatever happens here. Description This page documents useful idioms, helpful hints and tips for using Perl Data Language v2.0. Help Use "help help" within perldl or pdl2 or use the "pdldoc" program from the command line for access to the…
PDL::Threading – Tutorial for PDL’s Threading feature Introduction One of the most powerful features of PDL is threading, which can produce very compact and very fast PDL code by avoiding multiple nested for loops that C and BASIC users may be familiar with. The trouble is that it can take some getting used to, and…
PDL::Scilab – A guide for Scilab users. Introduction If you are a Scilab user, this page is for you. It explains the key differences between Scilab and PDL to help you get going as quickly as possible. This document is not a tutorial. For that, go to PDL::QuickStart. This document complements the Quick Start guide,…
PDL::QuickStart – Quick introduction to PDL features. Synopsis A brief summary of the main PDL features and how to use them. Description Introduction Perl is an extremely good and versatile scripting language, well suited to beginners and allows rapid prototyping. However until recently it did not support data structures which allowed it to do fast…
PDL::Philosophy — Why did we write PDL? Description Some history from the creator of PDL, leading into the philosophy and motivation behind this data language. This is an attempt to summarize some of the common spirit between pdl developers in order to answer the question “Why PDL”? The Start of PDL “Why is it that…
PDL::ParallelCPU – Parallel Processor MultiThreading Support in PDL (Experimental) Description PDL has support (currently experimental) for splitting up numerical processing between multiple parallel processor threads (or pthreads) using the set_autopthread_targ and set_autopthread_size functions. This can improve processing performance (by greater than 2-4X in most cases) by taking advantage of multi-core and/or multi-processor machines. Synopsis use…
PDL::PP – Generate PDL routines from concise descriptions Synopsis e.g. pp_def( ‘sumover’, Pars => ‘a(n); [o]b();’, Code => q{ double tmp=0; loop(n) %{ tmp += $a(); %} $b() = tmp; }, ); pp_done(); Functions Here is a quick reference list of the functions provided by PDL::PP. pp_add_boot Add code to the BOOT section of generated…
Inline::Pdlpp – Write PDL Subroutines inline with PDL::PP Description "Inline::Pdlpp" is a module that allows you to write PDL subroutines in the PDL::PP style. The big benefit compared to plain "PDL::PP" is that you can write these definitions inline in any old perl script (without the normal hassle of creating Makefiles, building, etc). Since version…
PDL::Objects — Object-Orientation, what is it and how to exploit it Description This still needs to be written properly. [Also, is there a good reason we don’t recommend storing extra object data in the header hash?] Inheritance There are basically two reasons for subclassing piddles. The first is simply that you want to be able…
PDL::Modules – A guide to PDL’s module reference. Description This page serves as a table of contents for PDL‘s module documentation. This page does not list every single PDL module. It only shows the ones intended for PDL users, while ommitting those which are deemed “for internal use only”. If you wish to see a…
PDL::MATLAB – A guide for MATLAB users. Introduction If you are a MATLAB user, this page is for you. It explains the key differences between MATLAB and PDL to help you get going as quickly as possible. This document is not a tutorial. For that, go to PDL::QuickStart. This document complements the Quick Start guide,…
PDL::Internals – description of some aspects of the current internals Description Intro This document explains various aspects of the current implementation of PDL. If you just want to use PDL for something, you definitely do not need to read this. Even if you want to interface your C routines to PDL or create new PDL::PP…
PDL::Indexing – Introduction to indexing and slicing piddles. Overview This man page should serve as a first tutorial on the indexing and threading features of PDL. Like all vectorized languages, PDL automates looping over arrays using a variant of mathematical vector notation. The automatic looping is called “threading”, in part because ultimately PDL will implement…
PDL::FAQ – Frequently asked questions about PDL Version Current FAQ version: 1.004 Description This is version 1.004 of the PDL FAQ, a collection of frequently asked questions about PDL – the Perl Data Language. About This Document Q: 1.1 Where to find this document You can find the latest version of this document at <http://pdl.perl.org/?docs=FAQ&title=Frequently%20Asked%20Questions>…
PDL::Delta – PDL changes between V1.0 and V2.0 Description This file is an attempt to list the major user-visible changes between PDL versions 1.0 and 2.0. Core Changes Piddles are not hashes any more: $a = zeroes 10,10; $$a{FOO} = "bar" doesn’t work. They are currently scalar references (to opaque C structures in finer terms)…
PDL::Dataflow — description of the dataflow philosophy Synopsis pdl> $a = zeroes(10); pdl> $b = $a->slice("2:4:2"); pdl> $b ++; pdl> print $a; [0 0 1 0 1 0 0 0 0 0] Warning Dataflow is very experimental. Many features of it are disabled for 2.0, particularly families for one-directional dataflow. If you wish to use…
PDL::Course – A journey through PDL’s documentation, from beginner to advanced. Author, Date This is written by David Mertens with edits by Daniel Carrera. Preface PDL‘s documentation is extensive. Some sections cover deep core magic while others cover more usual topics like IO and numerical computation. How are these related? Where should you begin? This…
PDL::Bugs – How to diagnose and report PDL problems Version version 1.0000 Description This module explains how to get help with a PDL problem and how, when, and where to submit a bug report. In the future it may be extended to provide some sort of automated bug reporting capability. If You Have A Pdl…