topic Re: scan function in SAS Procedures

scan function

cathy_sas — Fri, 21 Nov 2014 23:24:39 GMT

Dear All,

i new to sas. i am learning sas . i am exploring some sas functions.

i am testing scan function, it is not showing desired output.

data have;

chk="01 APR";

do i=1 to 3;

t=scan(chk,i,' ');

put t=;

g=length(t);

put g=;

if length(t) in (1 2) then d=t;

else if length(t)=3 then m=t;

else if length(t)=4 then y=t;

end;

put chk= d= m= y=;

run;

desired o/p;

chk=01 APR d=01 m=APR y=

but where as i got

chk=01 APR d=(missing) m=APR y=

it is getting puzzle to me , where i am going wrong

Thanks

Cathyn

Re: scan function

Tom — Sat, 22 Nov 2014 00:22:35 GMT

Add some more PUT statements so you can see what is happening inside your do loop.

data have;

input chk $20.;

put (_n_ chk) (=) ;

do i=1 to 3;

t=scan(chk,i,' ');

put i= t= @;

g=length(t);

put g= @;

if length(t) in (1 2) then d=t;

else if length(t)=3 then m=t;

else if length(t)=4 then y=t;

put (d m y) (=);

end;

put ;

cards;

01 APR

02 MAY 2014

run;

Perhaps you want to use the LENGTHN() function instead?

Re: scan function

Haikuo — Sat, 22 Nov 2014 00:25:20 GMT

two fixes, for one reason. Since you are learning (well, who isn't on this forum), I will give you the opportunities to check out some Docs yourself before giving out explanations.

data have;

chk="01 APR";

do i=1 to 3;

t=scan(chk,i,' ');

put t=;

g=length(t);

put g=;

if lengthn(t) in (1,2)

/*if length(t) in (2) */

then d=t;

else if length(t)=3 then m=t;

else if length(t)=4 then y=t;

end;

put chk= d= m= y=;

run;

Re: scan function

Jagadishkatam — Sat, 22 Nov 2014 04:43:06 GMT

Hi Cathyn,

To make it dynamic, i used the countw() which counts the number of words, separated by blank space. so once the count is available , we could use the same in do loop and can minimize the number of times the loop executes. This also corrects the problem you are facing. The use of lengthn function is also not required. Please try the below code,

data have;

chk="01 APR";

cnt=countw(chk);

do i=1 to cnt;

t=scan(chk,i,' ');

put t=;

g=length(t);

put g=;

if length(t) in (1 2) then d=t;

else if length(t)=3 then m=t;

else if length(t)=4 then y=t;

end;

put chk= d= m= y=;

run;

Thanks,

jag

Re: scan function

cathy_sas — Sat, 22 Nov 2014 19:52:34 GMT

TThank you all!!!!!

Before posting I used strip function to avoid trail blank. But doesn't work!!!

thank you Tom, hai.kuo and jag

cathy