pdl2 - Simple shell (version 2) for PDL
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]
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.
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)
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.