topic Re: by variables assigning new variables in SAS Programming

by variables assigning new variables

sophia_SAS — Thu, 02 May 2013 19:01:08 GMT

Grouped by ID, I would like to assign a 'rank' variable to the 'animal' variable. The trick is the values assigned for the new 'rank' variable may vary pending on the which animal variables are included within each ID grouping.

For examples, I have the below data set. If both "puppy" and "dog" are present within the same ID group, then dog=1 and puppy = 2 (See ID A or C). If only dog or only puppy is present regardless of the other animals present, then the value for either dog or puppy = 1 (See ID B or D).

data want;

input ID animal rank;

A dog 1

A bird 1

A puppy 2

B bird 1

B puppy 1

C dog 1

C puppy 2

D dog 1

D cat 1;

run;

Thanks!

Re: by variables assigning new variables

Ksharp — Fri, 03 May 2013 04:29:31 GMT

OK.

data want;
input      ID $ animal $;
cards;
             A  dog     
             A  bird     
             A  puppy  
             B  bird   
             B  puppy  
             C  dog   
             C  puppy 
             D  dog  
             D  cat  
;
run;
data want;
 do until(last.id);
  set want;
  by id;
  if animal='dog' then dog=1;
   else if animal='puppy' then puppy=1;
 end;
  do until(last.id);
  set want;
  by id;
  if dog and puppy then do;
                          if animal='puppy' then rank=2;
                                 else rank=1;
                              end;
    else if dog or puppy then rank=1;
  output;
 end;
 run;

Ksharp

Re: by variables assigning new variables

sophia_SAS — Fri, 03 May 2013 18:02:40 GMT

Thanks! This is very helpful!

Re: by variables assigning new variables

art297 — Fri, 03 May 2013 18:20:39 GMT

: I may have misunderstood what you are trying to achieve but, if not, I think the following (untested) change to 's code will get you what you want:

data want;
do until(last.id);
  set want;
  by id;
if animal='dog' then dog=1;
  else if animal='puppy' then puppy=1;
end;
  do until(last.id);
  set want;
  by id;
  if dog and puppy and animal='puppy' then rank=2;
else rank=1;
output;
 end;
 run;

Re: by variables assigning new variables

PGStats — Fri, 03 May 2013 18:38:20 GMT

A bit simpler...

data have;
input ID $ animal $;
datalines;
A dog
A bird
A puppy
B bird
B puppy
C dog
C puppy
D dog
D cat
;

data want;

do until (last.ID);

set have;

by ID;

dogPresent = dogPresent or lowcase(animal)="dog";

end;

do until (last.ID);

set have;

by ID;

rank = 1 + (lowcase(animal)="puppy" and dogPresent);

output;

end;

drop dogPresent;

run;