Thanks

I have tried using that as per suggestions by Perlbotics /p> 


#use strict;
use warnings;

my %A = (horse=> 'a',lion=>'b' ,mule=>'c',tiger =>'d');
my @order= sort  keys %A;

while (<DATA>) {
  warn("Line $.: cannot understand: $_") , next unless /(\w+);(\w+)/;
  my ($row, $col) = ($1,$2);
 $A {$row}{$col}++;
  $A{$col}{$row}++;
}

# print col. header
print "    ";
printf(" %2s",$_) for (@order);
print "\n";

#print matrix A
for my $row (@order) {
  printf(" %2s", $row);

  for my $col (@order) {
    printf(" %3d",  exists $A{$row}{$col} ? "1" : "0" );
  }
  print "\n";
}


__DATA__
horse;tiger
lion;mule
lion;tiger
horse;mule

[download]
I have got ouput 
        horse lion mule tiger
 horse   0   0   1   1
 lion   0   0   1   1
 mule   1   1   0   0
 tiger   1   1   0   0

[download]
However If u see in the code i have not use strict command; if using strict command in the first line error displayed will be Can't use string ("a") as a HASH ref while "strict refs" in use at work_matrix.pl line 12, <DATA> line 1.

What can be possible solution if using strict command?

In reply to Re^3: create a matrix for print 0 or 1 from pairing by vis1982
in thread create a matrix for print 0 or 1 from pairing by vis1982

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