How do I delete rows in a data frame?

Question

I have a data frame named "mydata" that looks like this

   A  B  C   D 

1. 5  4  4   4 

2. 5  4  4   4 

3. 5  4  4   4 

4. 5  4  4   4 

5. 5  4  4   4 

6. 5  4  4   4 

7. 5  4  4   4 

I'd like to delete row 2,4,6. For example, like this:

    A  B  C   D

1. 5  4  4  4 

3. 5  4  4  4 

5. 5  4  4  4 

7. 5  4  4  4 

Answer 1

To delete rows in a data frame we use the (-) operator along with the row names and assign it to our data frame.

In your case:

myData <- data.frame(A= rep(5,7),

                     B= rep(4,7),

                     C= rep(4,7),

                     D = rep(4,7))

myData <- myData[-c(2,4,6),]

myData

Output:

  A B C D

1 5 4 4 4

3 5 4 4 4

5 5 4 4 4

7 5 4 4 4

Note: Make sure that you add a comma after the row numbers to include all columns.