Here we are explaining how to write an R program to extract the five of the levels of factor created from a random sample from the LETTERS. Here we are using a built-in function factor() for this conversion. The vector values are passed to these functions directly here. The factor() functions in R computes the factors of the vector in a single function.
Using the function factor() we can create a factor of the vector. Factors are stored as integer vectors and which is closely related to vectors. The syntax of these functions are
factor(x = character(), levels, labels = levels,exclude = NA, ordered = is.ordered(x), nmax = NA)
#Where x is a vector of data, usually taking a small number of distinct values
Below are the steps used in the R program to extract the levels of factors created from random samples. In this R program, we directly give the values to built-in functions. And print the function result. Here we used variable Let for holding sample data and variable fac for finding the factors of the given data. Print the resulting factors.
STEP 1: Assign variable Let with sample data
STEP 2: First print original data values
STEP 3:Call the built-in function factor as fac = factor(Let)
STEP 4: Assign variable fac with the function result
STEP 5: Find the 5 levels as Let[1:5]
STEP 6: Give a table view for the result factors as table(Let[1:5])
Let = sample(LETTERS,size=50,replace=TRUE)
print("Original data:")
print(Let)
fac = factor(Let)
print("Original factors:")
print(fac)
print("Five of the levels")
print(table(Let[1:5]))
[1] "Original data:" [1] "H" "N" "O" "D" "L" "E" "H" "U" "W" "W" "S" "Q" "A" "O" "I" "G" "G" "W" "T" [20] "Z" "I" "S" "B" "P" "I" "F" "L" "B" "X" "A" "J" "V" "X" "C" "U" "A" "C" "W" [39] "D" "J" "X" "C" "U" "O" "F" "V" "Y" "Z" "W" "Z" [1] "Original factors:" [1] H N O D L E H U W W S Q A O I G G W T Z I S B P I F L B X A J V X C U A C W [39] D J X C U O F V Y Z W Z Levels: A B C D E F G H I J L N O P Q S T U V W X Y Z [1] "Five of the levels" D H L N O 1 1 1 1 1