Hello R-helpers,
I am having a difficult time figuring out the following: I have a data
frame with 24 variables. I need to remove redundant observations where,
within the same values of ID, V2 is equal to another observation in V2.
>ID V2
>1 23.9
>1 NA
>1 22.0
>1 23.9
>2 0.4
>2 NA
>2 NA
>2 3.0
>2 0.4
Thus, the new data frame would look like this (plus the other 22 variables):
>ID V2
>1 23.9
>1 NA
>1 22.0
>2 0.4
>2 NA
>2 3.0
Thank you in advance,
Barb
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