Here we are explaining how to write an R program to find the levels of a factor of a given vector. Here we are using built-in functions levels(factor()) for this calculation. The vector values are passed to these functions directly here. The levels(factor() function in R computes the levels of factors of the vector in a single function.
Using the function factor() we can create a factor of the vector and by using the level() function we can find levels of a factor. Factors are stored as integer vectors and which is closely related to vectors.
Below are the steps used in the R program to find the levels of a factor of a given vector. In this R program, we directly give the values to built-in functions. And print the function result. Here we used variable v for assigning vector values.
STEP 1: Assign variable v with vector values
STEP 2: Use the built-in functions
STEP 3: First print original vector values
STEP 4: levels(factor(v) with an argument as v to find levels of factors
STEP 5: print the result of the function
v = c(1, 2, 3, 3, 4, NA, 3, 2, 4, 5, NA, 5) print("The original vector is:") print(v) print("Levels of factor of the vector:") print(levels(factor(v)))
 "The original vector is:"  1 2 3 3 4 NA 3 2 4 5 NA 5  "Levels of factor of the vector:"  "1" "2" "3" "4" "5"