#设置柱子之间的间距 p1 <- g + geom_bar(aes(fill = drv), position = position_dodge( preserve = 'single', width = 0.5)) p2 <- g + geom_bar(aes(fill = drv), position = position_dodge( preserve = 'single', width = 1)) p3 <- g + geom_bar(aes(fill = drv), position = po...