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first_mb
2010 Feb 14
0
Keeping the attributes of an observation
Hey R list,
Can someone help me with following question?
I can create a listing of the unique observations in a dataframe by using:
df <- df [order(df $start),]
df $first_ob[!duplicated(df $ID)] <- "1"
df $first_ob[duplicated(df $ID)] <- "0"
Now I want to hold specific attributes of the first observation for other
(the second or third …) observation of a specific element (named ID).
So for example if I have an element with ID X that is ‘ok’...