lapply() function
The lapply() function helps us in applying functions on list objects and returns a list object of the same length. The lapply() function in the R Language takes a list, vector, or data frame as input and gives output in the form of a list object. Since the lapply() function applies a certain operation to all the elements of the list it doesn’t need a MARGIN.
Syntax: lapply( x, fun )
Parameters:
- x: determines the input vector or an object.
- fun: determines the function that is to be applied to input data.
Example:
Here, is a basic example showcasing the use of the lapply() function to a vector.
R
# create sample data names <- c("priyank", "abhiraj","pawananjani", "sudhanshu","devraj") print( "original data:") names # apply lapply() function print("data after lapply():") lapply(names, toupper) |
Output:
apply(), lapply(), sapply(), and tapply() in R
In this article, we will learn about the apply(), lapply(), sapply(), and tapply() functions in the R Programming Language.
The apply() collection is a part of R essential package. This family of functions helps us to apply a certain function to a certain data frame, list, or vector and return the result as a list or vector depending on the function we use. There are these following four types of function in apply() function family:
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