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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
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The pch stands for plot character. The pch contains numeric values rangers from 0 to 25 or character symbols (“+”, “.”, “;”, etc.) specifying in symbols (or shapes). The pch is the standard argument to set the character plotted in several R functions. The different points symbols commonly used in R are shown below.
Change R base plot point shapes The default R plot pch symbol is 1, which is an empty circle. You can change this to pch = 19 (solid circle) or to pch = 21 (filled circle). To change the color and the size of points, use the following arguments: col : color (hexadecimal color code or color name).
Using special characters as Pch values In the R Language, we can use “+”, “*“,”-“,”. “,”#, “%”, and “o” for plotting different symbols.
In case you need to add a title to the legend, in order to add some description of the elements of the legend, you can use the title argument. Note that you can customize the color of the text with the title. col argument and that you can make a horizontal adjustment of the title with the title. adj argument.
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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