Hi Folks:
I'd like to substring the first 3 digits of multiple variables all initialized with dx. In real dataset, I have dx01-25. My code posted below doesn't work.
Could you please help correct the existing code or suggest alternative approach to substring all dx01-dx25 without substr each variable individually?
Thanks for your time in advance.
data have;
input dx01 $ dx02 $ dx03 $ case;
cards;
15701 1576 2007 1
15701 2006 1007 1
10001 1576 1007 1
;
data want; set have;
array diag[*] dx01-dx03;
do i = 1 to dim(diag);
dx=diag[i];
DX_substr=substr(left(dx),1,3);
end;
drop i;
run;
Like this?
data HAVE;
input DX01 $ DX02 $ DX03 $ CASE;
cards;
15701 1576 2007 1
15701 2006 1007 1
10001 1576 1007 1
;
data WANT;
set HAVE;
array DXIN [3] DX01-DX03;
array DXOUT[3] ;
do I = 1 to dim(DXIN);
DXOUT[I]=substr(left(DXIN[I]),1,3);
end;
drop I;
run;
DX01 | DX02 | DX03 | CASE | DXOUT1 | DXOUT2 | DXOUT3 |
15701 | 1576 | 2007 | 1 | 157 | 157 | 200 |
15701 | 2006 | 1007 | 1 | 157 | 200 | 100 |
10001 | 1576 | 1007 | 1 | 100 | 157 | 100 |
Like this?
data HAVE;
input DX01 $ DX02 $ DX03 $ CASE;
cards;
15701 1576 2007 1
15701 2006 1007 1
10001 1576 1007 1
;
data WANT;
set HAVE;
array DXIN [3] DX01-DX03;
array DXOUT[3] ;
do I = 1 to dim(DXIN);
DXOUT[I]=substr(left(DXIN[I]),1,3);
end;
drop I;
run;
DX01 | DX02 | DX03 | CASE | DXOUT1 | DXOUT2 | DXOUT3 |
15701 | 1576 | 2007 | 1 | 157 | 157 | 200 |
15701 | 2006 | 1007 | 1 | 157 | 200 | 100 |
10001 | 1576 | 1007 | 1 | 100 | 157 | 100 |
Another way:
data WANT;
set HAVE;
array DXIN DX01 - DX03 ;
array DXOUT $3 DXO01 - DXO03 ;
do over DXIN;
DXOUT=DXIN;
end;
run;
Depending on what need the truncated versions for you may need even need to change the data. Use a format for display or group creation purposes:
data HAVE; input DX01 $ DX02 $ DX03 $ CASE; cards; 15701 1576 2007 1 15701 2006 1007 1 10001 1576 1007 1 ; proc print data=have; format dx: $3.; run;
The groups created by using a different format would be honored in most of the analysis, reporting or graphic procedures.
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