x=seq(-5,5,0.1) plot(x,dnorm(x),type=”l”) #密度函数曲线 abline(v=2.5,col=2)
library(plotrix) t<-seq(-pi,pi,0.3) r<- 1-cos(t/2) radial.plot(r,t,rp.type=”p”,lwd=3,line.col=3)
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