在R plot图例中添加pch符号 [英] Add pch symbol in R plot legend

问题描述

我有一个时间序列，用黑线表示，一个用红色曲线表示。然后我在R中有单个符号为8的点。这些是星星。见下图：

目前我有以下的图例：
$ b $ pre $ code> legend（bottomleft，
legend = c（log loss ，每日VaR，超额），
bty =n，lwd = 2，cex = 1.2，y.intersp = 1.4，col = c（black ），lty = c（1,1,1））

但我不想超越传说中的蓝线，而只是情节中的星星。我必须使用pch = 8。我只想拥有传说中的明星，而不是一线明星。所以不是这些解决方案：R的传奇问题，点的符号被行掩盖了

解决方案

试试这个。你设置lty只显示前两行，而pch只显示最后一个点。

  plot（1:10，rnorm （10）* 1:10）
 legend（bottomleft，legend = c（entry1，entry2，something cpl different），bty =n，
 lwd = 2 ，cex = 1.2，col = c（黑色，蓝色，红色），lty = c（1,1，NA），pch = c（NA，NA，8））
 code> 

I have one time series which is represented by a black line and one which is represented by a red curve. Then I have single points which have the pch symbol of 8 in R. These are stars. See the following plot:

Currently I have the following legend:

legend("bottomleft", 
 legend=c("log loss","daily VaR","exceedance"),
 bty = "n",lwd=2, cex=1.2,y.intersp=1.4, col=c("black","red","blue"), lty=c(1,1,1))

But I don't want to have a blue line in the legend for exceedance, but just the stars in the plot. I have to use the pch=8. I just want to have the stars in the legend, not the stars with a line. So not these solutions: R legend issue, symbols of points are masked by lines

解决方案

Try this. You set lty to display only first two lines, and pch to display only the last point.

plot(1:10, rnorm(10) * 1:10)
legend("bottomleft", legend = c("entry1", "entry2", "something cpl different"), bty = "n",
       lwd = 2, cex = 1.2, col = c("black", "blue", "red"), lty = c(1, 1, NA), pch = c(NA, NA, 8))

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