stem produces a stem-and-leaf plot of the values in x. The parameter scale can be used to expand the scale of the plot. A value of scale=2 will cause the plot to be roughly twice as long as the default.
stem产生x的值的茎和叶的图。参数scale可以用来扩大规模的图。一个scale=2价值会导致两倍只要是默认的图。