You want to produce a linear function mapping the minimum value in a list to 1 and the maximum in the list to 3. List::Util provides min() and max() functions. The coefficient of the linear term will be $m = (3 - 1)/(max(@list)-min(@list)), and the constant term will be $c = 1 - $m * min(@list). The map builtin will be handy to then apply that to the file data in @list.

After Compline,
Zaxo

In reply to Re: number normalization by Zaxo
in thread number normalization by Anonymous Monk

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