Remove consecutive duplicates from dataframe

Question

I have a data frame that I want to remove duplicates that are consecutive (in base). I know rle may be helpful here but can\'t think of how to use it. The exa

Answer 1

Here a fast solution using filter

dat[(filter(dat,c(-1,1))!= 0)[,1],]
     v1   v2
1     A  Jan
3     E  May
4     B  Feb
7     A  Jan
8     D  Apr
10    A  Mar
11    B  Feb
12    E  May
15    B  Feb
18    C  Mar
19    D  Apr
NA  

You need to add the last value of the original data to the result.