retain
2015-08-10 15:38
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data a; input name $ group @@; retain name2; if group = 1 then name2 = name; cards; zhang 1 . 2 . 3 li 1 wang 1 sun 1 . 2 . 3 . 4 ; run; proc print; run;
Obs | name | group | name2 |
---|---|---|---|
1 | zhang | 1 | zhang |
2 | 2 | zhang | |
3 | 3 | zhang | |
4 | li | 1 | li |
5 | wang | 1 | wang |
6 | sun | 1 | sun |
7 | 2 | sun | |
8 | 3 | sun | |
9 | 4 | sun |
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