This function is a copy of the "map" function used in Arduino code.
It takes an input value mapped from a min and max possible value and
scales it to a desired output min and max.
[output] = mapfun(value,fromLow,fromHigh,toLow,toHigh)
value: can be a scalar entry or a matrix of values
fromLow: lowest possible input value
fromHigh: highest possible input value
toLow: lowest desired output value
toHigh: highest possible output value
[output]: output matrix of same size as value
examples:
output = mapfun(-.3,-1,1,0,5)
output =
1.7500
output = mapfun([-1 1 -.5 .5],-1,1,0,5)
output =
0 5.0000 1.2500 3.7500
Created by David Coventry on 1/19/2017