attach(mtcars)
layout(matrix(c(1,1,2,3), 2, 2, byrow = TRUE))
hist(wt)
hist(mpg)
hist(disp)
detach(mtcars)
以下这段代码我自己在R studio 里面输入时就会显示 the figure margin is too large 生成不了图片，求大神帮忙！