Plot Shaded Area between vertical lines in R (original) (raw)

Last Updated : 21 Aug, 2021

Plotting a shaded area between vertical lines means to put a vertical rectangle on a different color plot as compared to the rest of the plot area. We create this rectangle depending on the conditional values of the x-axis and represent the pivot area on the basis of characteristics of the data. This can be obtained using R and is described how in his article.

Function used

• geom_rect() function is used to draw a rectangle

Syntax:

geom_rect(xmin, xmax, ymin, ymax, size, linetype, color, fill, alpha)

• geom_vline() draws a vertical line at a specified position

Syntax:

geom_vline(xintercept, size, linetype, color, alpha)

Approach 1:

• Create frame
• Create plot
• Now draw a rectangle to represent two vertical lines- first we will draw a hollow rectangle
• Now add required color using fill parameter

Program 1: Draw two vertical files

R `

x<-rpois(10,5) y<-rpois(10,7)

df<-data.frame(x,y)

library(ggplot2) ggplot(df,aes(x,y))+ geom_rect(aes(xmin=2,xmax=3,ymin=0,ymax=Inf),color="black",alpha=0)

`

Output:

Program 2: Fill color between lines

R `

x<-rpois(10,5) y<-rpois(10,7)

df<-data.frame(x,y)

library(ggplot2) ggplot(df,aes(x,y))+ geom_rect(aes(xmin=2,xmax=3,ymin=0,ymax=Inf),color="black",alpha=0)

`

Output:

Approach 2:

• Create frame
• Draw two vertical lines
• Fill color between them using a rectangle

Program 1: Drawing two lines

R `

x<-rpois(10,5) y<-rpois(10,7)

df<-data.frame(x,y)

library(ggplot2) ggplot(df,aes(x,y))+ geom_vline(xintercept=2,color="black")+ geom_vline(xintercept=3,color="black")

`

Output:

Program 2: Fill color between these lines

R `

x<-rpois(10,5) y<-rpois(10,7)

df<-data.frame(x,y)

library(ggplot2) ggplot(df,aes(x,y))+ geom_vline(xintercept=2,color="black")+ geom_vline(xintercept=3,color="black")+ geom_rect(aes(xmin=2,xmax=3,ymin=-Inf,ymax=Inf),fill="red")

`

Output: