You don't say what type of comparison function you want for the sort. The qsort, qsortvec and qsortveci all use the numeric value to sort. Looking at the PDL::Char source it seems there is an undocumented method to return the PDL::Char piddle as a standard PDL piddle. This may be of use.
pdl> use PDL::Char > > pdl> $p=PDL::Char->new(@a=([1,2,'c',3],[4,5,'a',6],[7,8,'b',9])); > > pdl> p $p > [ > [ '1' '2' 'c' '3' ] > [ '4' '5' 'a' '6' ] > [ '7' '8' 'b' '9' ] > ] > > > pdl> p $p->numeric > > [ > [ > [49] > [50] > [99] > [51] > ] > [ > [52] > [53] > [97] > [54] > ] > [ > [55] > [56] > [98] > [57] > ] > ] > > > Hope this helps. --Chris On Fri, May 30, 2014 at 3:20 AM, <[email protected]> wrote: > hi guys, > just a brief question about sorting a piddle. > > i have a piddle of this kind: > $p=PDL::Char->new(@a=([1,2,'c',3],[4,5,'a',6],[7,8,'b',9])); > > And i would like to sort it by columns for example columns 2 and 3. But > the only sorting i found in PDL was qsort and qsortvec but they dont do > what i want. I searched the net but could not find any info on this matter. > > I was thinking to convert it to regular perl array so i can sort as i want > but this is not very effective cos my actual piddle is large. > > Can you please help me in this matter? Any tips of info is appreciated > > Thank you > Dimitar > > > > _______________________________________________ > Perldl mailing list > [email protected] > http://mailman.jach.hawaii.edu/mailman/listinfo/perldl >
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