Hi I have a list of $a $b values which can go from (-180 --- 180) 

For example:
100 2
-2  44
150 9
26  -4
150 9
0   -1

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I want to create a 2 dimensional array 361x361 and set it to zero then start recording the count of combination $a $b the combination of 150 and 9 appeared twice on the list so the count will be 2 can I do something like this ? 

my @a = ((0) x 361);

my @b = ((0) x 361);

my @matrix = (@a,@b)

while ($line = <IN>)
{
@record   = split(/\s+/, $line);
$a = $record[0]; 
$b  = $record[1]; 
@matrix [$a+180][$b+180] ++;
}

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In reply to 2 D array by topaz

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