Map range: Difference between revisions

=={{header|Python}}==

<lang python>>>> def maprange( a, b, s):

(a1, a2), (b1, b2) = a, b

return b1 + ((s - a1) * (b2 - b1) / (a2 - a1))

>>> for s in range(11):

print("%2g maps to %g" % (s, maprange( (0, 10), (-1, 0), s)))

0 maps to -1

1 maps to -0.9

2 maps to -0.8

3 maps to -0.7

4 maps to -0.6

5 maps to -0.5

6 maps to -0.4

7 maps to -0.3

8 maps to -0.2

9 maps to -0.1

10 maps to 0</lang>