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Mac to Windows Data Incompatibility

by goshawk (Initiate)
on May 21, 2013 at 19:49 UTC ( #1034591=perlquestion: print w/ replies, xml ) Need Help??
goshawk has asked for the wisdom of the Perl Monks concerning the following question:

Hello, all. I'm having an issue with a large and difficult-to-produce piddle matrix that I made on a Mac OS with 64 architecture(8-byte long), which I want to use in a perl program on a Windows OS with 64 architecture (4-byte long). If at all possible, I want to avoid recreating this data.

I want to load in a matrix, slice a row, then calculate the Pearson's correlation of that row against each other row using PDL::Stats::Basic corr. This works fine when I create a matrix in Windows and find the correlation in Windows, and it also works when I use the data I want to use to find the correlation on Mac, but not when I use data from the Mac OS in Windows. I've tried using PDL::IO::Storable and PDL::IO::Dumper. When I save/load the matrix using PDL::IO::Storable, I get this error:

Long integer size is not compatible at C:/Perl64/lib/Storable.pm line +380, at test.pl line 6.
When I save/load the matrix using PDL::IO::Dumper, it loads fine, but the correlation no longer works. Here's a MWE:
# On Mac OS use PDL; use PDL::IO::Dumper; my $a = random(8,150); PDL::IO::Dumper::fdump($a, 'a.pldl'); # On Windows OS use PDL; use PDL::Stats::Basic; use PDL::IO::Dumper;` my $a = frestore('a.pldl'); my $b = $a->slice(':,3'); my $c = $a->corr($b); print $c->slice('(0)'), "\n";

This code returns '-1.#IND', which is Windows for nan. Am I getting caught by the different data sizes again?

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