Add Titles to a Graph in R Programming – title() Function
title()
function in R Language is used to add main title and axis title to a graph. This function can also be used to modify the existing titles.
Syntax:
title(main = NULL, sub = NULL, xlab = NULL, ylab = NULL, …)Parameters:
main: Main title of the graph
sub: Defines subtitlesReturns: Plot after title addition
Example 1:
# R program to add title to a Graph # Specifying axis values x<-1:5; y<-x*x # Creating a plot plot (x, y, main = "" , xlab = "" , ylab = "" , col.axis = "darkgreen" ) # Calling title() function title (main = "Graph " , sub = "Geeksforgeeks article" , xlab = "X axis" , ylab = "Y axis" , cex.main = 4, font.main = 3, col.main = "darkgreen" , cex.sub = 2, font.sub = 3, col.sub = "darkgreen" , col.lab = "black" ) |
Output:
In above example main title and sub titles are added to the plot. The arguments that can be used to change the font size are as follows:
- cex.main: size for main title
- cex.lab: text size for axis title
- cex.sub: text size of the sub-title
Example 2:
barplot ( c (1, 10) ) title (main = "PLOT " , sub = "Geeksforgeeks article" , xlab = "X axis" , ylab = "Y axis" , # Change the colors col.main= "darkgreen" , col.lab= "black" , col.sub= "darkgreen" , # Titles in italic and bold font.main = 4, font.lab = 4, font.sub = 3, # Change font size cex.main = 3, cex.lab = 1.7, cex.sub = 2 ) |
Output:
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