请教这个程序应该如何编写

jackbt123 发表于 2010-3-14 12:44
Hi bobguy,
should we consider the duplicate cases?
for instance,
x class
1 A
1 B
Thanks

I think we can in general as long as we define it clearly. It should not be a difficult one.

Learings！

Learnings！

正在学习中...

1# harlon1976


不好意思現醜了
此法的畫順序會被重新排過，不知道有沒有符合您的需求。


兩個變數

data a1;
input x class $1.;
cards;
1      A
5      B
4      A
2      B
8      A
;

data a2;
input x;
cards;
1
4
8
5
2
5
2
8
1
4
;

proc sort data=a1; by x;
proc sort data=a2; by x;
data a3; merge a2 a1; by x;
run;


三個變數


data a1;
input x y class $1.;
cards;
1   1   A
5   3   B
4   4   A
2   7   B
8   9   A
;

data a2;
input x y;
cards;
1 1
4 4
8 9
5 3
2 7
5 3
2 7
8 9
1 1
4 4
;

proc sort data=a1; by x y;
proc sort data=a2; by x y;
data a3; merge a2 a1; by x y;
run;