?相对频率直方图

Simulated frequency histogram statistic 模拟频率直方图统计 relative frequency histogram 相对频率直方图 histogram frequency distribution diagram 柱状图解频率分布图 ..

?直方图

... 直方图 Histograms ; Relative Frequency Histogram 二维直方图 bar 直方图修改 histogram modification ; histogram modification,histogram modification ...