kevin parks wrote: > hi, > > Seems my post added much confusion. Sorry... I was hoping not to have > to post my code since it is really wrong and slightly embarrassing..
I think the confusion was about what input range to use. From your code it looks like you want to use just the actual range of input values. > what i am trying to do is map an input range of values to output range. > I was hoping to make it a bit of an all purpose utility that would map > pretty much any input range to an output range, also do inverted > mapping... and also handle negative numbers and perhaps even a flag for > exponential mapping. > > import random > > def scaleX(in_seq, low, hi): > range1 = max(in_seq) - min(in_seq) > #range2 = max(out_seq) - min(outseq) > range2 = hi - low > ratio = range1/range2 > return [(x * ratio) for x in in_seq] This is actually pretty close. You have ratio backwards and you need to account for the offsets min(in_seq) and low. Try in_low = min(in_seq) ratio = range2/range1 return [ ((x-in_low) * ratio + low) for x in in_seq ] Kent _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
