I have 300+ objects with specific values for x,y,z coordinates, and I want to determine the distance between all 300+ objects and construct a matrix in the following fashion-

             A    B    C
        A   0    10    3

        B   4    0     7

        C   4     1    0

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where the values in the matrix are the distances between A and B, A and C etc. (I just made up the numbers). I've been given data like so,


      s  x         y      z
    A C  79.620  54.720  53.034
    B C  81.822  54.071  50.027
    C C  83.871  51.966  52.424
    ...

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And this equation for distance:

    $d = sqrt(($rx1 - $rx2)**2 + ($ry1 - $ry2)**2 + ($rz1 - $rz2)**2)

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s is a shape parameter that doesn't do anything for this calculation. I realize that I need to work with loops in order to do these crazy number of permutations, but I am not sure how to begin. I tried the following way to get a code to read and store the values in the file, but I could only get it read the first line. 

    open(IN, "template.xyz") or die;
    chomp($line = < IN >);
    ($b, @xyz) = split /\s+/, $line; 
    while (chomp($line = < IN >)) {
    ($bb, @xyzvals) = split /\s+/, $line;
    for ($i=0; $i<@xyzvals; $i++) {
    $s{$bb}{$xyz[$i]} = $xyzvals[$i];
        }
    }
    close(IN);

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Any advice on reading/storing the values properly and how to go about doing the permutations?

Original content restored above by GrandFather

I have 300+ objects with specific values for certain coordinates, and I want to determine a value between all 300+ objects and construct a matrix. Any advice on reading/storing the values properly and how to go about doing the permutations? (question resolved)

In reply to Employing loops and constructing a matrix by doozy

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