How to use stat_summary method In R Language
The ggplot method in R is used to do graph visualizations using the specified data frame. It is used to instantiate a ggplot object. Aesthetic mappings can be created to the plot object to determine the relationship between the x and y-axis respectively. Additional components can be added to the created ggplot object.
Syntax: ggplot(data = NULL, mapping = aes(), fill = )
Arguments :
- data – Default dataset to use for plot.
- mapping – List of aesthetic mappings to use for plot.
Geoms can be added to the plot using various methods. The geom_boxplot() method in R can be used to add box plots in the plots made. It is added as a component to the existing plot. Aesthetic mappings can also contain color attributes which is assigned differently based on different data frames.
geom_boxplot(alpha = )
The method stat_summary() can be used to add mean points to a box plot. It is used to add components to the made plot. This method saves the calculation of mean before plotting the data.
sSyntax: tat_summary(fun=mean, geom=)
Arguments :
- geom – The geometric object to use display the data
- position – The position adjustment to use for overlapping points on this layer
Example:
R
# Librarylibrary(ggplot2)# defining the columns of the data framedata_frame <- data.frame(col1=c(rep("A", 10) , rep("B", 12) , rep("C", 18)), col2=c( sample(2:5, 10 , replace=T) , sample(4:10, 12 , replace=T), sample(1:7, 18 , replace=T)) )# plotting the data framegraph <- ggplot(data_frame, aes(x=col1, y=col2, fill=col1)) + geom_boxplot(alpha=0.7) + stat_summary(fun=mean, geom="point", shape=20, color="blue", fill="blue") # constructing the graphprint(graph) |
Output
How to plot means inside boxplot using ggplot2 in R?
In this article, we are going to see how to plot means inside boxplot using ggplot in R programming language.
A box plot in base R is used to summarise the distribution of a continuous variable. It can also be used to display the mean of each group. Means or medians can also be computed using a boxplot by labeling points.