sas：将数组转化为矩阵

/*数组表*/
data a;
input name $ other $; 
cards;
a b
a c
a d
b a
b d
b f
c b 
c d
c a
c e
d c
d a
d e 
d f
e b 
e d
f a
f c
f b
a f
;
    /*排序*/
proc sort data=a out=c;
by name other;
run;
    /*复制表*/
data b;
input name2 $ other2 $;
cards;
a b
a c
a d
b a
b d
b f
c b 
c d
c a
c e
d c
d a
d e 
d f
e b 
e d
f a
f c
f b
a f
;
    /*排序*/
proc sort data=b out=d;
by name2 other2;
run;
    /*选择双向相关的数组*/
proc SQL;
create table cccc as select distinct a.name,a.other
from a,b
where a.other=b.name2 and a.name=b.other2;
run;
data m;
set cccc;
d=1;
run;
    /*利用转置过程*/
proc transpose data=m out=n(rename=(_name_=other));
var d;
by name;
id other;
label other=;
run;
proc contents data=n out=p;run;
proc sql;
select name into:var separated by ','  from p where name not like 'name' ;
create table x as select name,&var from n;
quit;
data u;
set x;
drop other;
run;

还有一个在知乎上问过的相关问题：
https://www.zhihu.com/question/46338489?from=profile_question_card
两个问题相互补充，很适合做社会网络分析