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What are strip charts in R?

AKASH BAJWA

In R programming, the stripchart() method is used to create strip charts. This method accepts a numeric vector and a list of more than one vector, then generates the strip chart for every vector.

Syntax

stripchart(x, method, jitter, main, xlab, ylab, col, pch, vertical, group.names)

Parameter

  • x: It represents the numeric vector that has to be plotted. It may also contain the list of the vector.

  • method: It helps to separate the points that have the same values. The method has an over-plot value to over-plot points by default. But it also has the option of jitter and stack.

  • Jitter: This helps represent the amount of jittering that has to be applied.

  • main: This shows the title of the chart.

  • xlab: The label regarding x-axis.

  • ylab: The label regarding y-axis.

  • col: The color of the points regarding the plot.

  • pch: The shape related to the points of the plot.

  • vertical: The default dimension of the plot is horizontal. But if the vertical is set as true then the plot will be vertical.

  • group.names: These are the group labels.

Example

We are using a built-in mtcars dataset to generate the strip chart. data("mtcars") is used to load the pre-loaded dataset. In line 4, we generate a strip chart with multiple attributes (mpg, hp, wt, vs, gear etc.) in different ranges along the x-axis.

# 1. Load dataset(Pre-loaded)
data("mtcars")
# 2. Generate Strip Chart
stripchart(mtcars)
Expected Output

Now let’s import the iris dataset in our program and try to plot the strip chart using _jitter_.

By using:

  • xlab= "Sepal length",

  • method= "jitter",

  • col= "Red",

  • pch= 3,

  • and the graph name "Graph for Length of Sepal",

we will get the following output.

# Load dataset
data("iris")
# Plotting chart
stripchart(iris$Sepal.Length,
  main="Graph for Length of Sepal",
  xlab="Sepal length",
  method="jitter",
  col="Red",
  pch=3
)
Expected Output
Expected Output

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