如题
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a=c(1,2,3,4,5,2,1,2,4,2,5,6)<br />
b=c("A","A","B","B","C","C","C","C","D","D","D","D")<br />
boxplot(a~b,boxwex=.24,at=1:4-.2,col="orange",axes=F)<br />
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a=c(3,4,1,2,5,2,1,2,4,2,5,6)<br />
b=c("B","B","A","A","C","C","C","C","D","D","D","D");boxplot(a~b,boxwex=.24,at=1:4-.2,col="orange",axes=F)<br />
上面两套代码做出来的图是一样的。
1）怎么确定boxplot时，横坐标画的每个类型（names）的顺序在R中是怎么确定的？
2）如果想要改变names的顺序应该怎么做?
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