How to add title at the top of multi-plots created by using gridExtra in R?

The gridExtra package works as an alternative of par(mfrow) with ggplot2, therefore, we can create multiple plots using ggplot2 and gridExtra on a single plot window. Now, if we want to give a title to all of the plots or we can say if want to give a main title to multi-plots, the top argument will be used to make the title lie on the top of the title. Similarly, we can use bottom, left, and right on the basis of our requirement but we would also need grid package for this purpose.

Example

Consider the below data frame −

set.seed(123)
x1<-rnorm(10)
x2<-rnorm(10,0.5)
x3<-rnorm(10,0.8)
x4<-rnorm(10,1.5)
df<-data.frame(x1,x2,x3,x4)
df

Output

      x1       x2       x3       x4
1  -0.56047565  1.72408180 -0.26782371 1.926464
2  -0.23017749  0.85981383  0.58202509 1.204929
3   1.55870831  0.90077145 -0.22600445 2.395126
4   0.07050839  0.61068272  0.07110877 2.378133
5   0.12928774 -0.05584113  0.17496073 2.321581
6   1.71506499  2.28691314 -0.88669331 2.188640
7   0.46091621  0.99785048  1.63778704 2.053918
8  -1.26506123 -1.46661716  0.95337312 1.438088
9  -0.68685285  1.20135590 -0.33813694 1.194037
10 -0.44566197  0.02720859  2.05381492 1.119529

Example

library(ggplot2)
library(gridExtra)
library(grid)
p1<-ggplot(df,aes(x1))+geom_histogram(bins=15)
p2<-ggplot(df,aes(x2))+geom_histogram(bins=15)
p3<-ggplot(df,aes(x3))+geom_histogram(bins=15)
p4<-ggplot(df,aes(x4))+geom_histogram(bins=15)
grid.arrange(p1,p2,p3,p4,nrow=2,top=textGrob("Histograms of 4 Variables"))

Nizamuddin Siddiqui

Updated on 24-Aug-2020 12:10:08

• Related Questions & Answers
• How to change the title of a graph to italic created by using plot function in R?
• How to add a citation in a plot created by using ggplot2 in R?
• How to set the chart title at the bottom using ggplot2 in R?
• How to add title to regression model using stargazer in R?
• How to add a horizontal line to the plot created by ggplot2 in R?
• How to change the position of the title of a plot which is created using plot function in R?
• How to write a common title for par(mfrow) plots in R?
• How to change the size of dots in dotplot created by using ggplot2 in R?
• How to reverse the X-axis labels of scatterplot created by using ggplot2 in R?
• How to increase the width of the lines in the boxplot created by using ggplot2 in R?
• How to change the angle of annotated text in plot created by using ggplot2 in R?
• How to label points in scatterplot created by using xyplot in R?
• How to change the background color of a plot created by using plot function in R?
• How to change the size of plots arranged using grid.arrange in R?
• How to create two 3d plots at a time in R?