pdl::autoloader(3) [suse man page]

AutoLoader(3)						User Contributed Perl Documentation					     AutoLoader(3)

NAME

       PDL::AutoLoader - MatLab style AutoLoader for PDL

SYNOPSIS

	use PDL::AutoLoader;
	$a = func1(...);   # Load file func1.pdl
	$b = func2(...);   # Load file func2.pdl

	$PDL::AutoLoader::Rescan = 1; # Enable re-scanning

DESCRIPTION

       This module implements a MatLab style AutoLoader for PDL. If a unknown function 'func()' is called then a file 'func.pdl' is searched for
       and if found is read in to define 'func()' which is then executed.

       Files are seached for using the directories in seach path @PDLLIB, which is initialised from the shell environment variable "PDLLIB" which
       is a colon seperated list of directories.

       e.g. in csh

	setenv PDLLIB "/home/kgb/pdllib:/local/pdllib"

       Note this is kept seperate from "PERL5LIB" just in case.

       As an added bonus, you can use a leading '+' on a directory name to search not just that directory but the entire directory tree under it
       (excluding symlinks).  The subdirs are determined by explicit search, and searches occur at startup and again each time you change the
       number of elements in @PDLLIB.

       For example,
	 setenv PDLLIB "+~kgb/PDL"

       will search /home/kgb/PDL and all its subdirectories for .pdl files.

   AUTO-SCANNING
       The variable $PDL::AutoLoader::Rescan controls whether files are automatically re-scanned for changes at the "perldl" command line.

       If "$PDL::AutoLoader::Rescan == 1" and the file is changed then the new definition is reloaded auto-matically before executing the "perldl"
       command line. Which means in practice you can edit files, save changes and have "perldl" see the changes automatically.

       The default is '0' - i.e. to have this feature disabled.

       As this feature is only pertinent to the "perldl" shell it imposes no overhead on PDL scripts. Yes Bob you can have your cake and eat it
       too!

       Note: files are only re-evaled if they are determined to have been changed according to their date/time stamp.

       No doubt this interface could be improved upon some more. :-)

   Sample file:
	sub foo { # file 'foo.pdl' - define the 'foo' function
	  my $x=shift;
	  return sqrt($x**2 + $x**3 + 2);
	}
	1; # File returns true (i.e. loaded successfully)

AUTHOR

       Copyright(C) 1997 Karl Glazebrook (kgb@aaoepp.aao.gov.au); several extensions by Craig DeForest (deforest@boulder.swri.edu) All rights
       reserved. There is no warranty. You are allowed to redistribute this software / documentation under certain conditions. For details, see
       the file COPYING in the PDL distribution. If this file is separated from the PDL distribution, the copyright notice should be included in
       the file.

BUGS

       No doubt this interface could be improved upon some more. :-)

       Will probably be quite slow if "$PDL::AutoLoader::Rescan == 1" and thousands of functions have been autoloaded.

       There could be a race condition in which the file changes while the internal autoloader code is being executed but it should be harmless.

       Probably has not been tested enough!

   PDL::AutoLoader::expand_path
       Expand a compactified path into a dir list

       You supply a pathlist and leading '+' and '~' characters get expanded into full directories.  Normally you don't want to use this -- it's
       internal to the autoloader -- but some utilities, like the online documentation searcher, need to be able to use it.

perl v5.12.1							    2009-10-17							     AutoLoader(3)

Check Out this Related Man Page

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

NAME

       PDL - the Perl Data Language

DESCRIPTION

       (For the exported PDL constructor, pdl(), see PDL::Core or pdl[2])

       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.

       For basic information on the PDL language, see the pdl(1) (lowercase) man page.

       You can run PDL programs directly as perl scripts that include the PDL module (with "use PDL;"), or via an interactive shell (see the
       perldl(1) man page).

       The PDL language extension 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.  See also PDL::Lite or PDL::LiteF if start-up 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.

       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 Lite and 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 v5.12.1							    2010-01-01								    PDL(3)

Linux and UNIX Man Pages

pdl::autoloader(3) [suse man page]

Check Out this Related Man Page