awk construct unfamiliar to me Post: 302678597

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pdl2

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)