R Programming: Find Levels of Factor in a given Vector

R Programming: Factors Exercise-1 with Solution

Write a R program to find the levels of factor of a given vector.

Sample Solution :

R Programming Code :

# Create a vector 'v' with values including some repeated numbers and NA values
v = c(1, 2, 3, 3, 4, NA, 3, 2, 4, 5, NA, 5)

# Print a message indicating the display of the original vector
print("Original vector:")

# Print the contents of the vector 'v'
print(v)

# Print a message indicating the display of the factor levels of the vector
print("Levels of factor of the said vector:")

# Convert the vector 'v' into a factor and print the unique levels (ignoring NA values)
print(levels(factor(v)))

Output:

[1] "Original vector:"
 [1]  1  2  3  3  4 NA  3  2  4  5 NA  5
[1] "Levels of factor of the said vector:"
[1] "1" "2" "3" "4" "5"                         

Explanation:

• v = c(1, 2, 3, 3, 4, NA, 3, 2, 4, 5, NA, 5):
• Creates a vector v containing a series of numbers (1, 2, 3, etc.), including NA values, which represent missing data.
• print("Original vector:"):
• Prints the message "Original vector:" to indicate that the next output will display the contents of the vector v.
• print(v):
• Prints the contents of the vector v, which includes the numerical values and NA entries.
• print("Levels of factor of the said vector:"):
• Prints the message "Levels of factor of the said vector:" to indicate that the next output will show the factor levels of v.
• print(levels(factor(v))):
• Converts the vector v into a factor and prints the unique levels (distinct values) in v, ignoring NA. The factor() function categorizes the values, and levels() extracts and displays the unique levels of these values.

R Programming Code Editor:

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