Big_Data_Slip_9

Slip No.7

1) Write an R program to change the first level of a factor with another level of a given factor.

1. Open RStudio.

2. Create a New Script:
Go to File > New File > R Script, or press Ctrl + Shift + N (Windows).

3. Type these code in the Script:

# Create a factor
factor_vector <- factor(c("Low", "Medium", "High", "Medium", "Low", "High"))

# Display the original factor and its levels
print("Original Factor:")
print(factor_vector)
print("Levels of Original Factor:")
print(levels(factor_vector))

# Change the first level to another level
# In this case, let's change the first level "High" to "Very High"
new_level <- "Very High"
levels(factor_vector)[1] <- new_level

# Display the modified factor and its levels
print("Modified Factor:")
print(factor_vector)
print("Levels of Modified Factor:")
print(levels(factor_vector))

4. Save the Script:
Save the script by going to File > Save, or press Ctrl + S (Windows). Name the file something like modify_factor_level.R.

5. Run the Script:
You can run the script by clicking the Source button at the top of the script editor, or by selecting the entire script and pressing Ctrl + Enter (Windows).