1PDL(3)                User Contributed Perl Documentation               PDL(3)
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NAME

6       PDL - the Perl Data Language
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DESCRIPTION

9       (For the exported PDL constructor, pdl(), see PDL::Core)
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11       PDL is the Perl Data Language, a perl extension that is designed for
12       scientific and bulk numeric data processing and display.  It extends
13       perl's syntax and includes fully vectorized, multidimensional array
14       handling, plus several paths for device-independent graphics output.
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16       PDL is fast, comparable and often outperforming IDL and MATLAB in real
17       world applications. PDL allows large N-dimensional data sets such as
18       large images, spectra, etc to be stored efficiently and manipulated
19       quickly.
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VECTORIZATION

22       For a description of the vectorization (also called "threading"), see
23       PDL::Core.
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INTERACTIVE SHELL

26       The PDL package includes an interactive shell. You can learn about it,
27       run "perldoc perldl", or run the shell "perldl" or "pdl2" and type
28       "help".
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LOOKING FOR A FUNCTION?

31       If you want to search for a function name, you should use the PDL shell
32       along with the "help" or "apropos" command (to do a fuzzy search).  For
33       example:
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35        pdl> apropos xval
36        xlinvals        X axis values between endpoints (see xvals).
37        xlogvals        X axis values logarithmicly spaced...
38        xvals           Fills an ndarray with X index values...
39        yvals           Fills an ndarray with Y index values. See the CAVEAT for xvals.
40        zvals           Fills an ndarray with Z index values. See the CAVEAT for xvals.
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42       To learn more about the PDL shell, see perldl or pdl2.
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LANGUAGE DOCUMENTATION

45       Most PDL documentation describes the language features. The number of
46       PDL pages is too great to list here. The following pages offer some
47       guidance to help you find the documentation you need.
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49       PDL::FAQ
50            Frequently asked questions about PDL. This page covers a lot of
51            questions that do not fall neatly into any of the documentation
52            categories.
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54       PDL::Tutorials
55            A guide to PDL's tutorial-style documentation. With topics from
56            beginner to advanced, these pages teach you various aspects of PDL
57            step by step.
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59       PDL::Modules
60            A guide to PDL's module reference. Modules are organized by level
61            (foundation to advanced) and by category (graphics, numerical
62            methods, etc) to help you find the module you need as quickly as
63            possible.
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65       PDL::Course
66            This page compiles PDL's tutorial and reference pages into a
67            comprehensive course that takes you from a complete beginner level
68            to expert.
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70       PDL::Index
71            List of all available documentation, sorted alphabetically. If you
72            cannot find what you are looking for, try here.
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DATA TYPES

75       PDL comes with support for most native numeric data types available in
76       C.  2.027 added support for C99 complex numbers.  See PDL::Core,
77       PDL::Ops and PDL::Math for details on usage and behaviour.
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MODULES

80       PDL includes about a dozen perl modules that form the core of the
81       language, plus additional modules that add further functionality.  The
82       perl module "PDL" loads all of the core modules automatically, making
83       their functions available in the current perl namespace.  Some notes:
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85       Modules loaded by default
86            See the SYNOPSIS section at the end of this document for a list of
87            modules loaded by default.
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89       PDL::Lite and PDL::LiteF
90            These are lighter-weight alternatives to the standard PDL module.
91            Consider using these modules if startup time becomes an issue.
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93       Exports
94            "use PDL;" exports a large number of routines into the calling
95            namespace.  If you want to avoid namespace pollution, you must
96            instead "use PDL::Lite", and include any additional modules
97            explicitly.
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99       PDL::NiceSlice
100            Note that the PDL::NiceSlice syntax is NOT automatically loaded by
101            "use PDL;".  If you want to use the extended slicing syntax in a
102            standalone script, you must also say "use PDL::NiceSlice;".
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104       PDL::Math
105            The PDL::Math module has been added to the list of modules for
106            versions later than 2.3.1. Note that PDL::Math is still not
107            included in the PDL::Lite and PDL::LiteF start-up modules.
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SYNOPSIS

110        use PDL; # Is equivalent to the following:
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112          use PDL::Core;
113          use PDL::Ops;
114          use PDL::Primitive;
115          use PDL::Ufunc;
116          use PDL::Basic;
117          use PDL::Slices;
118          use PDL::Bad;
119          use PDL::MatrixOps;
120          use PDL::Math;
121          use PDL::IO::Misc;
122          use PDL::IO::FITS;
123          use PDL::IO::Pic;
124          use PDL::IO::Storable;
125          use PDL::Lvalue;
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129perl v5.34.0                      2021-08-16                            PDL(3)
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