python - How to normalize a list of positive and negative decimal number to a specific range -


i have list of decimal numbers follows:

[-23.5, -12.7, -20.6, -11.3, -9.2, -4.5, 2, 8, 11, 15, 17, 21]

i need normalize list fit range [-5,5].
how can in python?

to range of input easy:

old_min = min(input) old_range = max(input) - old_min

here's tricky part. can multiply new range , divide old range, guarantees top bucket 1 value in it. need expand output range top bucket same size other buckets.

new_min = -5 new_range = 5 + 0.9999999999 - new_min output = [int((n - old_min) / old_range * new_range + new_min) n in input]

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