Syntax error How to use column with colours to change the colour of points using ggplot2 in R?

How to use column with colours to change the colour of points using ggplot2 in R?

If we have a colour column in an R data frame and we want to change the point colours in ggplot2 using that column then colour argument will be used. For example, if we have a data frame called df that contains three columns say x, y, and color then the scatterplot between x and y with the colour of points using color column can be created by using the command ggplot(df,aes(x,y))+geom_point(colour=df$color)

Example

Consider the below data frame −

Live Demo

> x<-rnorm(20)
> y<-rnorm(20)
> col<-sample(c("blue","red","green"),20,replace=T)
> df<-data.frame(x,y,col)
> df

Output

             x          y   col
1   1.92321342  1.2183501 green
2   0.73342537 -0.6477975 green
3  -1.00606105 -1.2697246   red
4   0.73504980 -0.5593899   red
5  -0.39976314  0.1185340 green
6  -1.15940677 -0.7219141 green
7   1.81313147 -2.1268507  blue
8  -0.47278398 -1.0414317  blue
9  -1.33914777 -0.2756125  blue
10  0.05742411  1.4000877  blue
11 -0.13134085 -0.8916141 green
12  0.87743445 -0.4291995 green
13  0.55897765  0.2815842  blue
14  0.51374603 -1.0219416  blue
15  0.27037163  0.7545370  blue
16  0.02100292  0.2674216 green
17  0.73620835  0.6262369  blue
18 -0.11391829 -0.7456059 green
19 -0.64697468  0.6713425   red
20  0.37972640  3.7717047   red

Loading ggplot2 package and creating scatterplot between x and y −

> library(ggplot2)
> ggplot(df,aes(x,y))+geom_point()

Output

Creating the scatterplot between x and y with colour of points in col column −

> ggplot(df,aes(x,y))+geom_point(colour=df$col)

Output

Updated on: 2021-03-05T07:17:27+05:30

2K+ Views

Kickstart Your Career

Get certified by completing the course

Get Started
Advertisements