How do you know whether your $a is joined from (12.24, 24.4812367) or (12.242, 4.4812367)?

I think you don't. Keep numeric data in an array and don't do arithmetic on strings. Your e1() and e2() subs are fine as arithmetic, so look at map or a loop construct.

Update: Take a look at PDL for efficient numeric operations on arrays of data.

After Compline,
Zaxo

In reply to Re: Is this enough good, or can be improved? by Zaxo
in thread Is this enough good, or can be improved? by pg

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