Concatenate multiple columns based on condition

[Tushar_G]

Hi 

I am trying to concatenate multiple columns bases on condition. Data is as follows.

CRN	Diff	Pay1	Pay2	Pay3	Pay4	Pay5	Pay6	Pay7	Pay8	Pay9	Pay10
1	1	000	084	084	084	000	XXX	000	XXX	XXX	XXX
2	10	065	000	000	000	000	XXX	XXX	XXX	XXX	XXX
3	-1	000	XXX	XXX	XXX	XXX	XXX	XXX	XXX	XXX	XXX
4	3	XXX	000	000	000	000	000	000	000	000	000
5	-2	070	070	070	070	070	070	070	XXX	XXX	XXX
6	1	090	XXX	XXX	XXX	XXX	XXX	XXX	XXX	XXX	XXX

The code I am using is as follows.

data temp;

set temp;

format hist $200.;

array col(*) Pay1-Pay10;

if diff=-1 then hist=catx('',col(2-10));

else if diff=-2 then hist=catx('',col(3-10));

else hist=catx('',col(*));

run;

I want concatenate column based on diff=-1 , -2 etc and concat corresponding columns.

The error I am getting is "array subscript out of range". Please help.

[PaigeMiller · Accepted solution]

This is a great example of why you should look at the SAS documentation first. The documentation of the CATX function gives the proper syntax for your case.