Help using Base SAS procedures

Do you have any idea for adding last(or maximum) value?

Reply
Occasional Contributor
Posts: 12

Do you have any idea for adding last(or maximum) value?

help.JPG

used code

-----------------------------------------------------------------------------------------------

data tp;

  set p ;

i=index(var1,'r')  ;

if i=1 then do idnum1=input(compress(var1, ' ', 'A'), 5.) ;

end;

if i=2 then do  idnum2=input(compress(var1, ' ', 'A'), 5.) ;

end;

run;

-----------------------------------------------------------------------------------------------

I want to make new variable(idnum3) from this dataset.

How could I make 'idnum3' 1 to 20 using last observation of 'idnum1' add to 'idnum2'.

If you have any idea please tell me.

thank you.

Trusted Advisor
Posts: 1,270

Re: Do you have any idea for adding last(or maximum) value?

Posted in reply to COLDORANGE

data have;
input var1 $;
i=index(var1,'r');
if i=1 then idnum1=input(compress(var1, ' ', 'A'), 5.) ;
if i=2 then idnum2=input(compress(var1, ' ', 'A'), 5.) ;
datalines;
rt01
rt02
rt03
rt04
rt05
rt06
rt07
rt08
rt09
rt10
tr01
tr02
tr03
tr04
tr05
tr06
tr07
tr08
tr09
tr10
;

proc sql;
select max(idnum1) into :max from have;
quit;

data want;
set have;
idnum3=sum(&max,idnum2);
run;

Super User
Posts: 6,751

Re: Do you have any idea for adding last(or maximum) value?

Posted in reply to COLDORANGE

Assuming that the portion of code that you posted is working as intended, you could add to the same DATA step:

retain last_idnum1;

if idnum1 > . then do;

  idnum3 = idnum1;

  last_idnum1 = idnum1;

end;

else idnum3 = sum(last_idnum1, idnum2);

Good luck.

Super User
Posts: 13,498

Re: Do you have any idea for adding last(or maximum) value?

Posted in reply to COLDORANGE

And if you want a simple row counter, assuming you may have more data

add

idnum3 = _n_; to the same data step.

Ask a Question
Discussion stats
  • 3 replies
  • 213 views
  • 0 likes
  • 4 in conversation