Syntax error How to label points in scatterplot created by using xyplot in R?

How to label points in scatterplot created by using xyplot in R?

To label points in scatterplot created by using xyplot, we can follow the below steps −

  • First of all, creating two numerical and one categorical vector.
  • Loading lattice package and creating scatterplot.
  • Creating the scatterplot with points labelled using categorical vector by panel.xyplot and ltext function.

Creating the vectors

Create three vectors, one categorical and two numerical −

 Live Demo

x<-sample(1:10,5)
y<-sample(1:10,5)
Dots<-c("A","B","C","D","E")
x
y
Dots

On executing, the above script generates the below output(this output will vary on your system due to randomization) −

[1] 7 3 2 10 5
[1] 1 2 5 4 8
[1] "A" "B" "C" "D" "E"

Loading lattice package and creating scatterplot

Use xyplot function to create the scatterplot between x and y −

library(lattice)
xyplot(y~x,data=data.frame(x,y),pch=20,cex=2)

Output

Creating the scatterplot with labels

Use panel.xyplot and ltext to create the scatterplot with labels −

x<-sample(1:10,5)
y<-sample(1:10,5)
Dots<-c("A","B","C","D","E")
xyplot(y~x,data=data.frame(x,y),pch=20,cex=2,panel=function(x,y,...){
+ panel.xyplot(x,y,...);
+ ltext(x=x,y=y,labels=Dots,pos=1)})

Output

Updated on: 2021-08-13T11:52:25+05:30

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