Check if the Object is a List in R Programming – is.list() Function
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:
# 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:
# 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
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