小编Nad*_* M.的帖子

有人可以帮我生成一个包含所有显示属性的条形图，并为每对条形图添加不同的背景颜色吗？
SE 是误差线。

Mat <- matrix(c(1.97, 0.61, 0.06, 0.06, 0.61, 0.51, 0.03, 0.25, 2.25, 1.36, 0.15, 0.17, 1.19, 1.41, 0.04, 0.25),ncol=4,byrow=TRUE)

rownames(Mat) <- c("Cognitive Strategies","Motivational Strategies","SE Cognitive Strategies","SE Motivational Strategies")

colnames(Mat) <- c("No Problems","Motivational Problems","Knowledge Problems","Both Problems")

Mat <- as.data.frame(Mat)


barplot(as.matrix(Mat[1:2, 1:4]), main=NULL, ylab = "Number of \n motivational and cognitive Strateiges (CI 95%)", cex.lab = 1.5, cex.main = 1.4, beside=TRUE, col=c("darkblue","red"))

我不知道如何更改每对条的背景颜色，特别是如何将其与错误条和图例放在同一代码中。