Hello everyone,
I have a list of providers, and I want to create a second dataset with each provider paired with one other provider. A provider will not be paired to itself.
table have
provider_id
a
b
c
d
e
....
table want
provider id1 provider id2
a b
a c
a d
a e
b c
b d
b e
c d
c e
d e
Thanks advance for all the inputs!!!
It appears that you have a second requirement that if the a-b pair has been generated that you do not want b-a. Is that correct?
Correct.
data have;
input provider_id $;
datalines;
a
b
c
d
e
;
proc sql;
create table want as
select a.provider_id as provider_id1, b.provider_id as provider_id2 from have a
cross join have b
where a.provider_id<b.provider_id;
quit;
You are trying to get all the combination of ID . OR try to use function COMB() .
data have; input provider_id $; datalines; a b c d e ; run; data want; set have end=last; array x{9999999} $ _temporary_; x{_n_}=provider_id; if last then do; do i=1 to _n_-1; do j=i+1 to _n_; id1=x{i};id2=x{j};output; end; end; end; keep id1 id2; run;
Xia Keshan
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