topic Re: Adding Based on File Name in SAS Programming

Adding Based on File Name

BCNAV — Wed, 24 Jan 2018 21:09:18 GMT

suppose I have the following variables that are organized like:

CYOW_ARR_NH

CYOW_ARR_H

CYOW_ARR_TOT

CYOW_DEP_NH

CYOW_DEP_H

CYOW_DEP_TOT

I would like to create a sum based on file name. For example, sum up all variables that have _ARR_NH, then maybe _DEP_H. That is, the variable can have anything in the first four letters, but add based on the suffix.

Any ideas?

thanks

Re: Adding Based on File Name

novinosrin — Wed, 24 Jan 2018 21:20:45 GMT

something like this:

data have;
array t(*) CYOW_ARR_NH

CYOW_ARR_H

CYOW_ARR_TOT

CYOW_DEP_NH

CYOW_DEP_H

CYOW_DEP_TOT (6*1)
;
run;

proc transpose data=have out=_have;
run;

proc sql;
create table want as
select _NAME_, sum(col1) as sum
from _have
group by _name_;
quit;

Re: Adding Based on File Name

BCNAV — Wed, 24 Jan 2018 21:32:17 GMT

thanks...suppose there can be any number of variables...is there a way to do this in the general case?

Re: Adding Based on File Name

Reeza — Wed, 24 Jan 2018 21:37:44 GMT

A dynamic approach is to transpose, generate a new variable that allows you to map the variables to the correct group and then summarize. In SQL you can do the last two steps at once.

Re: Adding Based on File Name

novinosrin — Wed, 24 Jan 2018 21:38:03 GMT

yes, the data have is just an example i took it from you. But the grouping is achieved by proc transpose regardless. So don't take notice of data have. Just the approach is transpose and group by. simple as that!!!!

Re: Adding Based on File Name

Astounding — Wed, 24 Jan 2018 21:50:45 GMT

A more generic version ...

proc transpose data=have out=_have;

var _numeric_;

run;

data want;

set _have;

prefix = scan(_name_, 1, '_');

suffix = substr(_name_, 1 + length(prefix));

run;

Now your data set is ready to sum up COL1 ... you can group by SUFFIX or even PREFIX if that makes sense.