Null object or value is a reserved word whose value is zero or Nill, which is usually returned by some functions that don't have any return value. Here we explain how to write an R program to assign NULL to a given list element.
In this R program, we are assigning the null value to the selected elements in a list. For that, we are adding the list of values to the variable lis. Then we are assigning the null value to the specified position elements in the list.
STEP 1: Assign variables lis with a list
STEP 2: Print the original lists
STEP 3:Assign NULL value to 2nd and 3rd element by giving lis[2] = list(NULL) , lis[3] = list(NULL)
STEP 4: Print the final list
lis = list(10, 20, 30, 40, 50)
print("Original list is:")
print(l)
print("Set 2nd and 3rd elements changes to NULL")
lis[2] = list(NULL)
lis[3] = list(NULL)
print(lis)
[1] "Original list is:" [[1]] [1] 10 [[2]] [1] 20 [[3]] [1] 30 [[4]] [1] 40 [[5]] [1] 50 [1] "Set 2nd and 3rd elements changes to NULL" [[1]] [1] 10 [[2]] NULL [[3]] NULL [[4]] [1] 40 [[5]] [1] 50
