R:如何在单个图中绘制两列比较直方图?
DataSet like:
Promise Bin Due Bin
early early
early >50
early >50
>50 >50
>50 >50
<=50 <=50
early early
early early
<=5 <50
<=5 <=5
<=30 <=30
early early
<=30 >50
<=30 <=30
<=10 <=10