Good afternoon folks,

I started programming with perl last week and perl is my first language so I'm a bit of a newbie. Basically I need help with a multidimensional array.

I have a 100k by 3 multidimensional array, contained in a CSV file. Each constituent array is a point in a 2D space with an intensity value taking up the third entry. But I need perl to calculate the norms of each constituent array and add those as a fourth column to this multidimensional array. So I would have a 100k by 4 multidimensional array.

Here's my code: 
sub norm{
    $p=$#data; #I call the 100k x 3 array @data
    for($i=0;$i<=$p; $i++){ # iterates down @data
        $norm=(($data[$i][0])**2+($data[$i][1])**2)**(1/2); #calculate
+s the norm
        push(@data[i],$norm); #pushes the norm into the correct row of
+ @data, yet I get an error.
    }
}

[download]

Specifically my syntax checker tells me that the "Type of arg 1 to push must be array (not array slice) near "$norm)"

Aid me wise monks!

In reply to pushing multidimensional arrays by afalsename

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