ggplot2绘图系统--几何对象之盒形图 参数: geom_boxplot(mapping = , #lower,middle,upper,x,ymax,ymin必须(有默认) #alpha/color/fill/linetype/shape/size/weight可选 data = , stat = 'boxplot', position = 'dodge', outlier.color = , #离群点颜色 outlier.shape = 19, outlier.size = 1.5, o…