 # R Program to find the levels of factor of a given vector

## How to find the levels of a factor of a given vector

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.

## How levels of a factor of a given vector are calculated in R Program

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.

## ALGORITHM

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

## R Source Code

```                                          ```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)))
```
```

## OUTPUT

``` "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"
```
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