PDL::Dbg - functions to support debugging of PDL scripts
use PDL; use PDL::Dbg; $c = $x->slice("5:10,2:30")->px->diagonal(3,4); PDL->px;
These packages implements a couple of functions that should come in handy when debugging your PDL scripts. They make a lot of sense while you're doing rapid prototyping of new PDL code, let's say inside the perldl or pdl2 shell.
Print info about an ndarray (or all known ndarrays)
pdl> PDL->px pdl> $y += $x->clump(2)->px('clumptest')->sumover pdl> $x->px('%C (%A) Type: %T') # prints nothing unless $PDL::debug pdl> $PDL::debug = 1 pdl> $x->px('%C (%A) Type: %T') PDL (52433464) Type: Double
This function prints some information about ndarrays. It can be invoked as a class method (e.g.
PDL->px ) or as an instance method (e.g.
- invoked as a class method
it prints info about all ndarrays found in the current package (excluding
myvariables). This comes in quite handy when you are not quite sure which pdls you have already defined, what data they hold , etc.
pxis supposed to support inheritance and prints info about all symbols for which an
isa($class)is true. An optional string argument is interpreted as the package name for which to print symbols:
The default package is that of the caller.
- invoked as an instance method
it prints info about that particular ndarray if
$PDL::debugis true and returns the pdl object upon completion. It accepts an optional string argument that is simply prepended to the default info if it doesn't contain a
%character. If, however, the argument contains a
%then the string is passed to the
infomethod to control the format of the printed information. This can be used to achieve customized output from
px. See the documentation of
PDL::infofor further details.
The output of px will be determined by the default formatting string that is passed to the
info method (unless you pass a string containing
% to px when invoking as an instance method, see above). This default string is stored in
$PDL::Dbg::Infostr and the default output format can be accordingly changed by setting this variable. If you do this you should also change the default title string that the class method branch prints at the top of the listing to match your new format string. The default title is stored in the variable
For historical reasons
vars is an alias for
There are probably some. Please report if you find any. Bug reports should be sent to the PDL mailing list email@example.com.
Copyright(C) 1997 Christian Soeller (firstname.lastname@example.org). All rights reserved. There is no warranty. You are allowed to redistribute this software / documentation under certain conditions. For details, see the file COPYING in the PDL distribution. If this file is separated from the PDL distribution, the copyright notice should be included in the file.