怎样用Mathematica做概率直方图30,40,60,31,32,35,86,75,43分成三个组,画出直方图

Question

怎样用Mathematica做概率直方图
30,40,60,31,32,35,86,75,43分成三个组,画出直方图

Answer 1

输入这个东东:
BarChart[{{30,40,60},{31,32,35},{86,75,43}},ChartLegends->{"a","b","c"}]
Histogram那个不行,那是频率分布直方图,比如输入:
Histogram[{30,40,60,31,32,35,86,75,43}]
软件会按照数据的范围,自己分组,然后用矩形高度标出每组数量的所占比重.