Adding data points to the violin plot
The width of a dot corresponds to the bin width in the case of a dot plot. This is followed by the case where the dots are stacked, where each of the dots represents one observation. To add data points we use geom_dotplot() after creating a violinplot.
Syntax:
geom_dotplot(mapping = NULL,data = NULL,binwidth = NULL,binaxis = “x”,stackdir = “up”)
Parameter :
- mapping – Set of aesthetic mappings created by aes()
- data – The data to be displayed
- binaxis – The axis to bin along, “x” or “y”
- stackdir – Defines the direction in which the dots should be stacked
- dotsize – The diameter of the dots relative to binwidth
Example: Adding data points to violin plot.
R
# defining the columns of the data frame data_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 frame ggplot (data_frame, aes (x = col1, y = col2, fill = col1)) + # adding violin plot geom_violin (alpha = 0.5) + geom_dotplot (binaxis = "y" , stackdir = "center" , dotsize = 0.5) |
Output:
How To Make Violinplot with Data Points in R?
In this article, we will discuss how to make violinplot with data points in the R programming language.
A violin plot is a compact display of a continuous distribution. The geom_violin() method in R is used to construct a violin plot in the working space which understands various aesthetic mappings, like alpha, color or fill.
Syntax:
geom_violin()
To construct a regular violin plot simply call the geom_violin() function after the visualization.
Example: A regular violin plot.
R
library ( "ggplot2" ) # defining the columns of the data frame data_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 frame ggplot (data_frame, aes (x = col1, y = col2, fill = col1)) + # adding violin plot geom_violin () |
Output: