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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\n";
     $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



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