def __call__(self, data, index):
        x = data[self.column].iget(index)
        a = float(min(data[self.column]))
        b = float(max(data[self.column]))
        return self.transform(self.min_size + ((x - a) / (b - a)) *
                              (self.max_size - self.min_size))
Return matplotlib scatter plot marker shape size.
dataset/ETHPy150Open pydata/pandas/pandas/tools/rplot.py/ScaleSize.__call__