Check if the Object is a List in R Programming - is.list() Function Last Updated : 12 Jun, 2020 Comments Improve Suggest changes Like Article Like Report is.list() function in R Language is used to return TRUE if the specified data is in the form of list, else returns FALSE. Syntax: is.list(X) Parameters: x: different types of data storage Example 1: Python3 # R program to illustrate # is.list function # Initializing some list a <- list(1, 2, 3) b <- list(c("Jan", "Feb", "Mar")) c <- list(matrix(c(1, 2, 3, 4, 5))) d <- list(list("green", 12.3)) # Calling is.list() function is.list(a) is.list(b) is.list(c) is.list(d) Output: [1] TRUE [1] TRUE [1] TRUE [1] TRUE Example 2: Python3 # R program to illustrate # is.list function # Initializing a data frame "Biochemical Oxygen # Data" data sets x <- BOD # Each row of the data frame is a list a <- x[2, ] # Each column of the data frame is not a list b <- x[, 1] # Calling is.list() function is.list(a) is.list(b) Output: [1] TRUE [1] FALSE Comment More infoAdvertise with us Next Article Check if the Object is a List in R Programming - is.list() Function K Kanchan_Ray Follow Improve Article Tags : R Language R List-Function Similar Reads Check if the Object is a Matrix in R Programming - is.matrix() Function is.matrix() function in R Language is used to return TRUE if the specified data is in the form of matrix else return FALSE. Syntax: is.matrix(x) Parameters: x: specified matrix Example 1: Python3 # R program to illustrate # is.matrix function # Specifying some different types of arrays A <- matri 1 min read Check if an Object is a Table in R Programming - is.table() Function is.table() function in R Language is used to check if an object is a table. Syntax: is.table(x) Parameters: x: Object to be checked Example 1: Python3 1== # R Program to check # if an object is a table # Creating a vector vec = c(2, 4, 3, 1, 2, 3, 2, 1, 4, 2) # calling is.table() Function is.table(v 1 min read Check if an Object is of Type Numeric in R Programming - is.numeric() Function is.numeric() function in R Language is used to check if the object passed to it as argument is of numeric type. Syntax: is.numeric(x) Parameters: x: Object to be checked Example 1: Python3 # R program to check if # object is of numeric type # Calling is.numeric() function is.numeric(1) is.numeric(1. 1 min read Check if an Object is of Type Integer in R Programming - is.integer() Function is.integer() function in R Language is used to check if the object passed to it as argument is of integer type. Syntax: is.integer(x) Parameters: x: Object to be checked Example 1: Python3 1== # R program to check if # object is an integer # Creating a vector x1 <- 4L x2 <- c(1:6) x3 <- c( 1 min read Checking if the Object is a Factor in R Programming - is.factor() Function is.factor() function in R Language is used to check if the object passed to the function is a Factor or not. It returns a boolean value as output. Syntax: is.factor(Object) Parameters: Object: Object to be checked Example 1: Python3 1== # Creating a vector x<-c("female", "male 1 min read Convert an Object to List in R Programming - as.list() Function as.list() function in R Programming Language is used to convert an object to a list. These objects can be Vectors, Matrices, Factors, and dataframes. Syntax: as.list(object) Parameters: object: Vector, Matrix, factor, or data frame R - as.list() Function ExampleExample 1: Converting Vector to list 2 min read Check if an Object is sorted or not in R Programming - is.unsorted() Function is.unsorted() function in R Language is used to check if an object is sorted or not. It returns False if the object is sorted otherwise True. Syntax: is.unsorted(x) Parameters: x: Object Example 1: Python3 1== # R Program to check if # an object is sorted # Creating a vector x <- c(1:9) # Creatin 1 min read Check if an Object is a Call in R Programming - is.call() Function is.call() function in R Language is used to determine whether x is a call or not. Syntax: is.call(x) Parameters: x: an arbitrary R object Example 1: Python3 # R program to illustrate # is.call function # Calling is.call() function is.call(call) Output: [1] FALSE Example 2: Python3 # R program to ill 1 min read Check if the Object is a Data Frame in R Programming - is.data.frame() Function is.data.frame() function in R Language is used to return TRUE if the specified data type is a data frame else return FALSE. R data.frame is a powerful data type, especially when processing table (.csv). It can store the data as row and columns according to the table. Syntax: is.data.frame(x) Paramet 1 min read Like