Re^2: Matrix Manipulation with Perl

So I went and installed Math::Matrix, which does matrices ok, except I could not find a way to do an inverse (which I really really need) even though it said as the header for the documentation it could do inversion, but there was no routine for it.

So then I decided to try the PDL because it said that it could do inversion and actually had a command called "inv" listed. I got PDL::Matrix and PDL::MatrixOps modules loaded up,

root@admin PDL-2.4.2# perl -MPDL::Matrix -e shell
root@admin PDL-2.4.2# perl -MPDL::MatrixOps -e shell
root@admin PDL-2.4.2#

but when I tried to run a simple program to confirm it was working I got this error:

Can't locate object method "xchg" via package "PDL::Matrix" at /usr/lib/perl5/site_perl/5.8.3/i386-linux-thread-multi/PDL/Matrix.pm line 137.

I am now lost. I do not know what this means except that there might be some module that I need loaded that I forgot to load. Any ideas?

Chris Herold

Comment on Re^2: Matrix Manipulation with Perl

Replies are listed 'Best First'.
Re^3: Matrix Manipulation with Perl by etj (Priest) on Jun 22, 2022 at 18:55 UTC
The above does not "get modules loaded up". It runs two Perl processes each of which load a given module, try to execute the string "shell" (which will evaluate to a string, doing nothing), then exit. Instead, the way forward is to run either `perldl` or `pdl2` on the command line, which will load the PDL REPL. It has builtin help, and there is also the MetaCPAN page: https://metacpan.org/pod/perldl.	[reply] [d/l] [select]
Re^3: Matrix Manipulation with Perl by Tanktalus (Canon) on Jun 30, 2005 at 04:06 UTC
Not that I know anything about PDL at all, but seeing as no one else has responded: can you pare down the simple program to show the error with as few lines as is reasonably possible? That way I could go and install this stuff here and try it out, for example. Or someone else might beat me to it <crossing fingers> ;-)	[reply]