我用这个绘制了两条密度曲线:
Network <- Mydf$Networks
quartiles <- quantile(Mydf$Avg.Position, probs=c(25,50,75)/100)
density <- ggplot(Mydf, aes(x = Avg.Position, fill = Network))
d <- density + geom_density(alpha = 0.2) + xlim(1,11) + opts(title = "September 2010") + geom_vline(xintercept = quartiles, colour = "red")
print(d)
我想计算给定 Avg.Position 范围的每条曲线下的面积。有点像正常曲线的 pnorm 。有任何想法吗?