Scale a min and max value to equal interval domain with
        numStops discrete values

def scale_between(minval, maxval, numStops):
    """ Scale a min and max value to equal interval domain with
        numStops discrete values
    """

    scale = []

    if numStops < 2:
        return [minval, maxval]
    elif maxval < minval:
        raise ValueError()
    else:
        domain = maxval - minval
        interval = float(domain) / float(numStops)
        for i in range(numStops):
            scale.append(round(minval + interval * i, 2))
        return scale