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