What is the expand.grid() function in R?

Overview

The expand.grid() function in R is used to return a data frame from all combinations of the vector or factor objects supplied to it.

Syntax

expand.grid(...)
Syntax for the expand.grid() function

Parameter

This function takes the ... as a parameter value. It indicates the vectors, factors, or a list containing these.

Return value

The expand.grid() function returns a data frame that contains a row for each combination of the supplied vectors or factors.

Example

Let's look at the code below:

#creating factor objects 

a <- c( 1, 2, 3)

b <- c( 4, 5, 6)

c <- c( 7, 8, 9)



# implementing the expand.grid() function 

expand.grid(a, b, c)

Explanation

  • Lines 2 to 4: We create factor objects, a, b and c.
  • Line 7: We call the expand.grid() function and pass the factor objects as its arguments. We obtain and print the result to the console.

Free AI Mock Interviews
Coding Interview
Coding PatternsFree Interview
Gain insights and practical experience with coding patterns through targeted MCQs and coding problems, designed to match and challenge your expertise level.
System Design
You TubeFree Interview
Learn to design a video streaming platform like YouTube by tackling functional and non-functional requirements, core components, and high-level to detailed design challenges.

Free Resources

License: Creative Commons-Attribution-ShareAlike 4.0 (CC-BY-SA 4.0)