pdl2(1p) [debian man page]
PDL2(1p) User Contributed Perl Documentation PDL2(1p) NAME
pdl2 - Simple shell (version 2) for PDL SYNOPSIS
Use PDL interactively: %> pdl2 pdl> $a = sequence(10) # or any other perl or PDL command pdl> print "$a = $a "; $a = [0 1 2 3 4 5 6 7 8 9] DESCRIPTION
The "pdl2" program, also known as the Perldl2 shell, is a second generation version of the original "perldl" interactive PDL shell. It attempts to be backward compatible in usage while providing improved features, better support for Perl syntax, and an more easily extended framework based on the Devel::REPL shell. If you have Devel::REPL version 1.003011 or later, then "pdl2" will start with full functionality. If Devel::REPL is not installed or found then "pdl2" will print a warning and run the legacy "perldl" shell command instead. By default, command lines beginning with the default prompt of either "pdl2" or "perldl" (one of 'pdl> ', 'PDL> ', or 'perldl> ') will have the prefix string and surrounding whitespace stripped. This allows for easy cut-and-paste from sample PDL shell sessions or other examples into another PDL shell session. FUNCTIONS
do_print Toggle print-by-default on and off (default value: off) By default, "pdl2" does not print the results of operations since the results can be very large (e.g., a small 640x480 RGBA image is still more than 1_000_000 elements). However, for experimenting and debugging more complex structures, it helps to see the results of every operation. The "do_print" routine allows you to toggle between the default "quiet" operation and a full Read, Evaluate, Loop style. pdl> $a = pdl(3,2) pdl> do_print 1 pdl> $a = pdl(3,2) $PDL1 = [3 2]; pdl> do_print pdl> $a = pdl(3,2) VARIABLES
$PDL::toolongtoprint The maximal size pdls to print (defaults to 10000 elements). This is not just a "perldl" or "pdl2" variable but it is something that is usually needed in an interactive debugging session. SEE ALSO
perldl, Devel::REPL perl v5.14.2 2012-05-19 PDL2(1p)
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PDL(3pm) User Contributed Perl Documentation PDL(3pm) NAME
PDL - the Perl Data Language DESCRIPTION
(For the exported PDL constructor, pdl(), see PDL::Core) PDL is the Perl Data Language, a perl extension that is designed for scientific and bulk numeric data processing and display. It extends perl's syntax and includes fully vectorized, multidimensional array handling, plus several paths for device-independent graphics output. PDL is fast, comparable and often outperforming IDL and MATLAB in real world applications. PDL allows large N-dimensional data sets such as large images, spectra, etc to be stored efficiently and manipulated quickly. VECTORIZATION
For a description of the vectorization (also called "threading"), see PDL::Core. INTERACTIVE SHELL
The PDL package includes an interactive shell. You can learn about it, run "perldoc perldl", or run the shell "perldl" or "pdl2" and type "help". LOOKING FOR A FUNCTION
? If you want to search for a function name, you should use the PDL shell along with the "help" or "apropos" command (to do a fuzzy search). For example: pdl> apropos xval xlinvals X axis values between endpoints (see xvals). xlogvals X axis values logarithmicly spaced... xvals Fills a piddle with X index values... yvals Fills a piddle with Y index values. See the CAVEAT for xvals. zvals Fills a piddle with Z index values. See the CAVEAT for xvals. To learn more about the PDL shell, see perldl or pdl2. LANGUAGE DOCUMENTATION
Most PDL documentation describes the language features. The number of PDL pages is too great to list here. The following pages offer some guidance to help you find the documentation you need. PDL::FAQ Frequently asked questions about PDL. This page covers a lot of questions that do not fall neatly into any of the documentation categories. PDL::Tutorials A guide to PDL's tutorial-style documentation. With topics from beginner to advanced, these pages teach you various aspects of PDL step by step. PDL::Modules A guide to PDL's module reference. Modules are organized by level (foundation to advanced) and by category (graphics, numerical methods, etc) to help you find the module you need as quickly as possible. PDL::Course This page compiles PDL's tutorial and reference pages into a comprehensive course that takes you from a complete beginner level to expert. PDL::Index List of all available documentation, sorted alphabetically. If you cannot find what you are looking for, try here. MODULES
PDL includes about a dozen perl modules that form the core of the language, plus additional modules that add further functionality. The perl module "PDL" loads all of the core modules automatically, making their functions available in the current perl namespace. Some notes: SYNOPSIS See the SYNOPSIS section at the end of this document for a list of modules loaded by default. PDL::Lite and PDL::LiteF These are lighter-weight alternatives to the standard PDL module. Consider using these modules if startup time becomes an issue. Exports "use PDL;" exports a large number of routines into the calling namespace. If you want to avoid namespace pollution, you must instead "use PDL::Lite", and include any additional modules explicitly. PDL::NiceSlice Note that the PDL::NiceSlice syntax is NOT automatically loaded by "use PDL;". If you want to use the extended slicing syntax in a standalone script, you must also say "use PDL::NiceSlice;". PDL::Math The PDL::Math module has been added to the list of modules for versions later than 2.3.1. Note that PDL::Math is still not included in the PDL::Lite and PDL::LiteF start-up modules. SYNOPSIS
use PDL; # Is equivalent to the following: use PDL::Core; use PDL::Ops; use PDL::Primitive; use PDL::Ufunc; use PDL::Basic; use PDL::Slices; use PDL::Bad; use PDL::MatrixOps; use PDL::Math; use PDL::Version; use PDL::IO::Misc; use PDL::IO::FITS; use PDL::IO::Pic; use PDL::Lvalue; perl v5.14.2 2012-05-19 PDL(3pm)