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Hi,
I have the following dataset with two columns of date. The last column
contain missing value at three positions. Now what I need to do is to
replace those missing values by NAV.
Original dataset:
start_ stop_
Obs date date
1 01/19/06 02/02/06
2 01/19/06 .
3 01/30/06 02/02/06
4 01/26/06 01/28/06
5 01/08/06 01/16/06
6 01/23/06 01/26/06
7 01/23/06 01/26/06
8 12/30/05 01/25/06
9 01/10/06 .
10 01/17/06 01/25/06
11 01/24/06 01/30/06
12 01/15/06 01/29/06
13 02/01/06 02/05/06
14 02/17/06 .
15 02/01/06 02/05/06
16 01/28/06 02/06/06
17 02/02/06 02/06/06
18 02/04/06 02/14/06
19 02/03/06 02/18/06
Wanted :
start_ stop_
Obs date date
1 01/19/06 02/02/06
2 01/19/06 NAV
3 01/30/06 02/02/06
4 01/26/06 01/28/06
5 01/08/06 01/16/06
6 01/23/06 01/26/06
7 01/23/06 01/26/06
8 12/30/05 01/25/06
9 01/10/06 NAV
10 01/17/06 01/25/06
11 01/24/06 01/30/06
12 01/15/06 01/29/06
13 02/01/06 02/05/06
14 02/17/06 NAV
15 02/01/06 02/05/06
16 01/28/06 02/06/06
17 02/02/06 02/06/06
18 02/04/06 02/14/06
19 02/03/06 02/18/06
I have tried the following format statement:
proc format;
value $date . ='N/AV' other=[mmddyy8.];
run;
But it can not serve my purpose.
Please show me some way.
Thanks and regards,
Madan Kundu
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