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Here is an interesting tidbit for people just learning. You always want to print your piddles to see what you are doing wrong, but PDL has a limit set of 30000 elements, and if your piddles exceed that, you get the dreaded 'TOO LONG TO PRINT' error message. Fortunately the PDL modules have easy-to-override subs, so you can use this module to print any size piddle.

Include this somewhere in your PERL5LIB, and

use pdldump;

# file pdldump.pm package PDL::Core; my $max_elem = 10000000; # set your max here sub PDL::Core::string { my ( $self, $format ) = @_; if ( $PDL::_STRINGIZING ) { return "ALREADY_STRINGIZING_NO_LOOPS"; } local $PDL::_STRINGIZING = 1; my $ndims = $self->getndims; if ( $self->nelem > $max_elem ) { return "TOO LONG TO PRINT"; } if ( $ndims == 0 ) { if ( $self->badflag() and $self->isbad() ) { return "BAD"; } else { my @x = $self->at(); return ( $format ? sprintf( $format, $x[ 0 ] ) : "$x[0]" ); } } return "Null" if $self->isnull; return "Empty" if $self->isempty; # Empty piddle local $PDL::Core::sep = $PDL::use_commas ? "," : " "; local $PDL::Core::sep2 = $PDL::use_commas ? "," : ""; if ( $ndims == 1 ) { return PDL::Core::str1D( $self, $format ); } else { return PDL::Core::strND( $self, $format, 0 ); } } 1;

I'm not really a human, but I play one on earth. Cogito ergo sum a bum

In reply to Re: RFC: PDL Cheat Sheet by zentara
in thread RFC: PDL Cheat Sheet by lin0

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