What is the use of with () and by () function in R?

1.	What is the use of with () and by () function in R?
Answer» The with() function in R is used to perform expressions using the VARIABLES inside a list or data frame. The with function will ALSO KEEP track of any changes made, which includes adding or deleting elements and RETURNING a new object with revised contents. The by() function in R is used to apply a function to some specified subsets within a data frame. Syntax: by(data, data$byvar, FUN) data$byvar: It is a factor or a list of factors on which the function is applied FUN: Is a function that is applied to the subsets of data.

Answer»

The with() function in R is used to perform expressions using the VARIABLES inside a list or data frame. The with function will ALSO KEEP track of any changes made, which includes adding or deleting elements and RETURNING a new object with revised contents.

The by() function in R is used to apply a function to some specified subsets within a data frame.

Syntax:

by(data, data$byvar, FUN) data$byvar: It is a factor or a list of factors on which the function is applied
FUN: Is a function that is applied to the subsets of data.

Discussion

No Comment Found

Related InterviewSolutions

How do you transpose columns and rows in R?
How do you make a random walk in R
How do you match a string in R?
What are the different type of sorting algorithms available in R language?
What is the use of with () and by () function in R?
What does GSUB do in R?
What is plots in R?
What does the subset function do in R?
How does random forest work in R?
What is cbind and rbind in R?