Transform_by_2_intervals

Transformation of a float between 2 intervals.
Example transform a number X between -1 and 1
to a float Y between 0 and 100.

Take care about inputs, there are no safety mechanisms.

Update version 2: I don't know how I had this error, but something was bad in the formula. Sorry for the guys who already downloaded the 1st version. It's correct now.

Little update 24.09.2016: correct tag and category, nothing more.