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How to display tick marks on upper as well as right side of the plot using ggplot2 in R?
To display tick marks on upper as well as right side of the plot, we can create duplicate axes for X as well Y by using scale_x_continuous and scale_y_continuous functions. The argument that will help us in this case is sec.axis and we need to set it to dup_axis as scale_x_continuous(sec.axis=dup_axis()) and scale_y_continuous(sec.axis=dup_axis()). Check out the below example to understand how it can be done.
Example
Consider the below data frame −
x<-rnorm(20) y<-rnorm(20) df<-data.frame(x,y) df
Output
x y 1 0.11204135 0.29084737 2 0.61199138 0.48121914 3 0.48760949 -0.21450790 4 -0.87200194 0.67532122 5 -2.24557725 0.27402959 6 0.76593441 -0.12197485 7 1.94506052 2.53583915 8 -0.35843587 -0.77521246 9 -1.50236224 -0.68711682 10 -0.11789693 -0.22534300 11 1.51156266 -0.77355032 12 -0.50594024 -0.91056427 13 0.69102879 -0.01354832 14 -0.62664213 0.44946662 15 -1.00403558 -0.62376588 16 -0.01299667 0.62897816 17 -1.23493618 -0.33727209 18 1.16264196 -0.68264496 19 -2.53843314 -0.21478113 20 0.47694554 0.52879296
Loading ggplot2 package and creating scatterplot between x and y −
Example
library(ggplot2) ggplot(df,aes(x,y))+geom_point()
Output
Creating scatterplot between x and y with axes on upper and right side of the plot −
Example
ggplot(df,aes(x,y))+geom_point()+scale_x_continuous(sec.axis=dup_axis())+scale_y_continuous(sec.axis=dup_axis())
Output
Updated on: 16-Mar-2021
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