001、
par(mfrow = c(2,2)) plot(1:10, main = 1111) plot(1:10, xlab = pi, main = 2222) plot(1:10, xlab = bquote(pi), main = 3333) ##借助bquote函数输出π plot(1:10, xlab = "π", main = 4444) ## 直接输出π
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标签：输出,pi,语言,10,xlab,plot,绘图,main From： https://www.cnblogs.com/liujiaxin2018/p/17538032.html