1Dbg(3) User Contributed Perl Documentation Dbg(3)
2
6 PDL::Dbg - functions to support debugging of PDL scripts
7
9 use PDL;
10 use PDL::Dbg;
11 $c = $a->slice("5:10,2:30")->px->diagonal(3,4);
13 PDL->px;
14
16 This packages implements a couple of functions that should come in
17 handy when debugging your PDL scripts. They make a lot of sense while
18 you're doing rapid prototyping of new PDL code, let's say inside the
19 perldl shell.
20
22 px
23 Print info about a piddle (or all known piddles)
24 perldl> PDL->px
26 perldl> $b += $a->clump(2)->px('clumptest')->sumover
27 perldl> $a->px('%C (%A) Type: %T')
28 This function prints some information about piddles. It can be invoked
30 as a class method (e.g. "PDL->px" ) or as an instance method (e.g.
31 "$pdl->px($arg)"). If
32 invoked as a class method
34 it prints info about all piddles found in the current package
35 (excluding "my" variables). This comes in quite handy when you are
36 not quite sure which pdls you have already defined, what data they
37 hold , etc. "px" is supposed to support inheritance and prints info
38 about all symbols for which an "isa($class)" is true. An optional
39 string argument is interpreted as the package name for which to print
40 symbols:
41 perldl> PDL->px('PDL::Mypack')
43 The default package is that of the caller.
45 invoked as an instance method
47 it prints info about that particular piddle if $PDL::debug is true
48 and returns the pdl object upon completion. It accepts an optional
49 string argument that is simply prepended to the default info if it
50 doesn't contain a "%" character. If, however, the argument contains a
51 "%" then the string is passed to the "info" method to control the
52 format of the printed information. This can be used to achieve
53 customized output from "px". See the documentation of "PDL::info" for
54 further details.
55 The output of px will be determined by the default formatting string
57 that is passed to the "info" method (unless you pass a string
58 containing "%" to px when invoking as an instance method, see above).
59 This default string is stored in $PDL::Dbg::Infostr and the default
60 output format can be accordingly changed by setting this variable. If
61 you do this you should also change the default title string that the
62 class method branch prints at the top of the listing to match your new
63 format string. The default title is stored in the variable
64 $PDL::Dbg::Title.
65 For historical reasons "vars" is an alias for "px".
67 vars
69 Alias for "px"
70
72 There are probably some. Please report if you find any. Bug reports
73 should be sent to the PDL mailing list perldl@jachw.hawaii.edu.
74
76 Copyright(C) 1997 Christian Soeller (c.soeller@auckland.ac.nz). All
77 rights reserved. There is no warranty. You are allowed to redistribute
78 this software / documentation under certain conditions. For details,
79 see the file COPYING in the PDL distribution. If this file is separated
80 from the PDL distribution, the copyright notice should be included in
81 the file.
82perl v5.12.3 2009-10-17 Dbg(3)