NAME

       pdl2 - Simple shell (version 2) for PDL

SYNOPSIS

       Use PDL interactively:

         %> pdl2

         pdl> $x = sequence(10)  # or any other perl or PDL command

         pdl> print "\$x = $x\n";
         $x = [0 1 2 3 4 5 6 7 8 9]

         pdl> with_time { print +($A->matmult($B))->info, "\n" } for 1..5;

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.

       For shell-like "Ctrl-C" handling, you need Sys::SigAction installed.

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> $x = pdl(3,2)

         pdl> do_print
         1
         pdl> $x = pdl(3,2)
         $PDL1 = [3 2];
         pdl> do_print

         pdl> $x = 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