Create Dot Charts in R Programming - dotchart () Function
Last Updated :
11 Apr, 2023
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dotchart() function in R Language is used to create a dot chart of the specified data. A dot chart is defined as a plot which is used to draw a Cleveland dot plot.
Syntax: dotchart(x, labels = NULL, groups = NULL, gcolor = par("fg"), color = par("fg")) Parameters: x: it is defined as numeric vector or matrix labels: a vector of labels for each point. groups: a grouping variable indicating how the elements of x are grouped. gcolor: color to be used for group labels and values. color: the color(s) to be used for points and labels.
Example 1:
# Dot chart of a single numeric vector
dotchart(mtcars$mpg, labels = row.names(mtcars),
cex = 0.9, xlab = "mpg")
Output: 
Example 2:
# Plot and color by groups cyl
grps <- as.factor(mtcars$cyl)
my_cols <- c("blue", "darkgreen", "orange")
dotchart(mtcars$mpg, labels = row.names(mtcars),
groups = grps, gcolor = my_cols,
color = my_cols[grps],
cex = 0.9, pch = 22, xlab = "mpg")
Output: 
Example :
# Create a vector of data
data <- c(3, 8, 12, 15, 19, 22, 24, 27, 30)
# Create a vector of labels for the data points
labels <- c("A", "B", "C", "D", "E", "F", "G", "H", "I")
# Create a dot chart
dotchart(data, labels = labels, main = "Dot Chart Example", xlab = "Value", ylab = "Label")
output :
