SAS：根据两列和多行中的值选择观察组

Question

在SAS中，我需要根据多行中两个变量的值选择主题及其数据行。在下面的数据中，ID是相关的BY组。我需要输出与在所有行中具有X（0,1,9）和Y =缺失的人相关联的行组。因此，对于ID = 01，不会输出任何行，因为它在另外两行中具有X = 1且不缺少Y.对于ID = 02和ID = 03，必须输出两行。并且必须输出ID = 04的行。谢谢。

ID  X Y  
01  1 .  
01  . 1  
01  . 1  
02  0 .  
02  . .  
03  9 .  
03  . .  
04  1 .  

Answer 1

试试这个：

data have;
input ID $ X Y;
cards;
01 1 .
01 . 1
01 . 1
02 0 .
02 . .
03 9 .
03 . .
04 1 .
;
proc sql;
  select * from have group by id having x in(0,1,9) and sum(y) is null;
quit;

Answer 2

data have;
input ID $ X Y;
cards;
01 1 .
01 . 1
01 . 1
02 0 .
02 . .
03 9 .
03 . .
04 1 .
;
run;

proc sort data=have;
  by id;
run;

data list;
set have;
by id;
retain keepit;
if first.id then keepit = .;

if missing(keepit) or keepit=1 then do;
    if missing(y) then do;
        if x in (0,1,9) then keepit = 1;
    end;
    else keepit = 0;
end;

if last.id and keepit then output;
keep id;
run;

data want;
    merge
        have (in=a)
        list (in=b)
    ;
    by id;
    if a and b;
run;