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填充值> 0 I有以下幾點:ř多邊形:在密度圖
set.seed(513)
x1 = rnorm(12^6, 5,5)
x2 = x1-10
plot(density(x1),xlim = c(-25,25), ylim = c(0,0.09), xaxs = "i", yaxs = "i", main ="", xaxt = "n", yaxt = "n", xlab = "", ylab = "", col = "blue")
lines(density(x2), col = "red")
axis(side = 1, pos = 0, at = c(-30,-20,-10,0,10,20,30), labels = c("",-2,-1,0,+1,+2,""), tck = -0.02)
lines(x=c(0,0),y=c(0,1), lty = 3)
polygon(density(x1[x1>=0]), col = rgb(0,0,0.5,0.5))
polygon(density(x2[(x2)>=0]), col = rgb(0.5,0,0,0.5))
par(xpd=TRUE)
text("Frequency", x = -29, y = 0.045, srt = 90)
par(xpd=FALSE)
我想作的曲線圖,其示出了兩個正常的曲線,其中X> 0具有填充的顏色空間。我嘗試使用polygon
但似乎與密度奮鬥(好像用x1[x1>=0]
限制了密度函數的數據,我想我需要它來分配第一和然後砍吧)
我想補兩條曲線下的空間,其中X爲零或更大。