Hi all,
I have a sample of data set with variables day, ID,var and month:
day ID var Month
1 11 x March
1 11 x March
1 11 x April
1 11 y March
1 11 x March
1 11 y March
2 11 x March
2 11 y March
3 11 x March
3 11 y March
4 11 y March
In the above data set there are four unique days within ID. For example
ID "11" has four records on day 1 and if this ID has "y" in "March" then I
want keep "y" and discard "xs". Is it possible to keep them in two data
sets ( wanted and unwanted)
The output for wanted data set will be:
1 11 y March
1 11 x April
1 11 y March
2 11 y March
3 11 y March
4 11 y March
thanks in advance
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