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Re^2: counting pairwise incidences

by ikegami (Pope)
on May 17, 2011 at 17:26 UTC ( #905319=note: print w/replies, xml ) Need Help??


in reply to Re: counting pairwise incidences
in thread counting pairwise incidences

Looks like ab ac ad to me, in which case it simplifies to:
use strict; use warnings; my %pairs; while (<DATA>) { my ($first, @names) = split; for my $second (@names) { my $p = join '_', $first, $second; ++$pairs{$p}; } } while (my ($k, $v) = each %pairs) { print "$k: $v\n"; } __DATA__ tomD gly4 phil aesG tomD gly4 phil aesG phil aesG tomD gly4

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[stevieb]: I have a 3 day winter survival kit in my vehicle in the event I get snowed in in the mountains (which has happened before due to avalanches closing the roads (and once in the summer due to a massive forest fire that trapped us
[perldigious]: a handful of people in my work area did not make it, but I live pretty close and it's flat the whole way, so I didn't have any trouble. The roundabout is the worst thing I have to negotiate.
[thezip]: G'day all!
[perldigious]: Well, that and dodging the people who forget how ice works right away. :-)
[stevieb]: hey, thezip
[perldigious]: I don't miss having to drive up and down in elevation on roads that are iced over, I white knuckled gripping the steering wheel every time I had to where I used to live.
[perldigious]: So I don't envy you mountain guys if you have to drive in the winter, even with tire chains.
MidLifeXis waves.
[stevieb]: man, I absolutely LOVE driving in the worst winter conditions. In the mountainous roads, there are extremely few (if any) other drivers. I love the challenge. I've been doing extreme off-road my whole life, and as I said, I'm always well...
[stevieb]: ...prepared for even the very worst

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