R Programming - Remove Solar.R and 'Wind' Variables from airqualit

R Programming: Data frame Exercise-26 with Solution

Write a R program to call the (built-in) dataset airquality. Remove the variables 'Solar.R' and 'Wind' and display the data frame.

Sample Solution :

R Programming Code :

# Load the built-in airquality dataset
data = airquality

# Print a message indicating that the following data is from the airquality dataset
print("Original data: Daily air quality measurements in New York, May to September 1973.")

# Print the original data frame
print(data)

# Remove the 'Solar.R' variable from the data frame
data[,c("Solar.R")] = NULL

# Remove the 'Wind' variable from the data frame
data[,c("Wind")] = NULL

# Print a message indicating that the following data frame has had 'Solar.R' and 'Wind' variables removed
print("data.frame after removing 'Solar.R' and 'Wind' variables:")

# Print the modified data frame
print(data)

Output:

[1] "Original data: Daily air quality measurements in New York, May to September 1973."
    Ozone Solar.R Wind Temp Month Day
1      41     190  7.4   67     5   1
2      36     118  8.0   72     5   2
3      12     149 12.6   74     5   3
4      18     313 11.5   62     5   4
5      NA      NA 14.3   56     5   5
.........
152    18     131  8.0   76     9  29
153    20     223 11.5   68     9  30
[1] "data.frame after removing 'Solar.R'  and 'Wind' variables:"
    Ozone Temp Month Day
1      41   67     5   1
2      36   72     5   2
3      12   74     5   3
4      18   62     5   4
5      NA   56     5   5
.........
152    18   76     9  29
153    20   68     9  30                         

Explanation:

• data = airquality
• Loads the built-in dataset airquality into the variable data.
• print("Original data: Daily air quality measurements in New York, May to September 1973.")
• Prints a message indicating the following output is the original airquality dataset.
• print(data)
• Displays the content of the data data frame before any modifications.
• data[,c("Solar.R")] = NULL
• Removes the column Solar.R from the data data frame.
• data[,c("Wind")] = NULL
• Removes the column Wind from the data data frame.
• print("data.frame after removing 'Solar.R' and 'Wind' variables:")
• Prints a message indicating that the following output is the data data frame after removing the specified columns.
• print(data)
• Displays the content of the modified data data frame, showing that the Solar.R and Wind columns have been removed.

R Programming Code Editor:

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