Adding Title and Subtitle To R Plot
Method 1. By Using ggtitle() function:
For this, we simply add ggtitle() function to a geom_bar() function. Inside ggtitle() function, we can directly write the title that we want to add to the plot without defining any parameter but for add Subtitle to the plot using ggtitle() function, we have to use subtitle parameter to ggtitle() function and then assign the subtitle to that parameter.
Syntax : ggtitle(“Title of the Plot”, subtitle = “Subtitle of the Plot”)
Parameter :
- we give title that we want to add, as it’s parameter.
- subtitle is used as a second parameter of ggtitle() function to add subtitle of plot.
Below is the implementation:
R
# Load Package library(ggplot2) # Create a Data data <- data.frame( Name=c("A", "B", "C", "D", "E"), Value=c(3, 12, 5, 18, 45) ) # Create a BarPlot and add title # and subtitle to it using ggtitle() function. ggplot(data, aes(x = Name, y = Value)) + geom_bar(stat = "identity", fill = "green")+ ggtitle("Title For Barplot", subtitle = "This is Subtitle" ) |
Output:
Method 2. By Using labs() Function:
To add Title and Subtitle to R Plot using labs() function, things are same as above only difference is we use labs() function instead of ggtitle() function and assign title that we want to add to the parameter called ‘title’. Subtitle can be added using the same parameter of the above example. Output is also the same as the above example output.
Syntax : ggtitle(“Title of the Plot”, subtitle = “Subtitle of the Plot”)
Parameter :
- title is used as a first parameter to add the title of Plot.
- subtitle is used as a second parameter to add the subtitle of Plot.
Below is the implementation:
R
# Load Package library(ggplot2) # Create Data data <- data.frame( Name = c("A", "B", "C", "D", "E") , Value = c(3, 12, 5, 18, 45) ) # Create BarPlot and add title # and subtitle to it using labs() function. ggplot(data, aes(x = Name, y = Value)) + geom_bar(stat = "identity", fill = "green")+ labs(title = "Title For Barplot", subtitle = "This is Subtitle" ) |
Output:
ggplot2 – Title and Subtitle with Different Size and Color in R
A Title and the subtitle to a plot give a piece of information about the graph that what the graph actually wants to represent. This article describes how to add a Title and Subtitle with Different Sizes and Colors using ggplot2 in R Programming.
To add a Title and Subtitle within a plot, first, we have to import ggplot2 library using library() function. If you have not installed yet, you can simply install it by writing a command install.packages(“ggplot2”) in R Console.
library(ggplot2)
Consider the following data for the example:
data <- data.frame(
name=c("A","B","C","D","E") ,
value=c(3,12,5,18,45)
)
| Name | Value | |
|---|---|---|
| 1 | A | 3 |
| 2 | B | 12 |
| 3 | C | 5 |
| 4 | D | 18 |
| 5 | E | 45 |
Creating a Plot using ggplot() function with the value of X-axis as Name and Y-axis as Value and make it a barplot using geom_bar() function of the ggplot2 library. Here we use the fill parameter to geom_bar() function to color the bars of the plots.
R
# Load Package library(ggplot2) # Create a Data data <- data.frame( Name=c("A", "B", "C", "D", "E") , Value=c(3, 12, 5, 18, 45) ) # Create a Simple BarPlot with green color. ggplot(data, aes(x = Name, y = Value)) + geom_bar(stat = "identity", fill = "green") |
Output: