BookmarkSubscribeRSS Feed
🔒 This topic is solved and locked. Need further help from the community? Please sign in and ask a new question.
MohitDamani
Calcite | Level 5

How can i get first occurance basis multiple by variable for eg

for below data i need 1 in new column where ever i have unique combination of id1 & id2

id1id2
100110
100110
100111
100110
100212
100212
100213
1 ACCEPTED SOLUTION

Accepted Solutions
Kurt_Bremser
Super User

@MohitDamani wrote:
i need combination of both variables like we do partition by in SQL, for eg row 1,3,5 & 7 should have 1 rest 0


A slight expansion of @PeterClemmensen's code shows that it clearly works:

data have;
input id1 id2;
n = _n_;
datalines;
1001 10
1001 10
1001 11
1001 10
1002 12
1002 12
1002 13
;
run;

proc sort data = have;
	by id1 id2;
run;

data want;
	set have;
	by id1 id2;
	if first.id2 then first_unique = 1;
	else first_unique = 0;
run;

proc print data=want noobs;
run;

Result:

                     first_
  id1    id2    n    unique

 1001     10    1       1  
 1001     10    2       0  
 1001     10    4       0  
 1001     11    3       1  
 1002     12    5       1  
 1002     12    6       0  
 1002     13    7       1  

If you need the original order restored, just sort by n.

View solution in original post

8 REPLIES 8
PeterClemmensen
Tourmaline | Level 20

I think this is what you want, but please post your data in the form of a datastep and describe your desired outcome if not

 

data have;
input id1 id2;
datalines;
1001 10
1001 10
1001 11
1001 10
1002 12
1002 12
1002 13
;

proc sort data = have;
	by id1 id2;
run;

data want;
	set have;
	by id1 id2;
	if first.id2 then first_unique = 1;
	else first_unique = 0;
run;
MohitDamani
Calcite | Level 5
Tried, not working, i need combination of both variables like we do partition by in SQL
MohitDamani
Calcite | Level 5
i need combination of both variables like we do partition by in SQL, for eg row 1,3,5 & 7 should have 1 rest 0
Kurt_Bremser
Super User

@MohitDamani wrote:
i need combination of both variables like we do partition by in SQL, for eg row 1,3,5 & 7 should have 1 rest 0


A slight expansion of @PeterClemmensen's code shows that it clearly works:

data have;
input id1 id2;
n = _n_;
datalines;
1001 10
1001 10
1001 11
1001 10
1002 12
1002 12
1002 13
;
run;

proc sort data = have;
	by id1 id2;
run;

data want;
	set have;
	by id1 id2;
	if first.id2 then first_unique = 1;
	else first_unique = 0;
run;

proc print data=want noobs;
run;

Result:

                     first_
  id1    id2    n    unique

 1001     10    1       1  
 1001     10    2       0  
 1001     10    4       0  
 1001     11    3       1  
 1002     12    5       1  
 1002     12    6       0  
 1002     13    7       1  

If you need the original order restored, just sort by n.

RW9
Diamond | Level 26 RW9
Diamond | Level 26

Post test data in the form of a datastep!!

 

/* assumes sorted */

data want;
  set have;
  by id1 id2;
  if first.id2 then new_var=1;
run;
TarunKumar
Pyrite | Level 9

data have;
input id1 id2;
datalines;
1001 10
1001 10
1001 11
1001 10
1002 12
1002 12
1002 13
;
RUN;

 

proc sort data = have;
by id1 id2;
run;

 

data want;
set have;
by id1 id2;
if first.id1 then first_unique = 1;
else first_unique = 0;
run;

 

OR 

 

if yo want to extract the unique data then pls use below code ;

 


proc sort data = have OUT= WANT NODUP;BY ID1;

run;

Jagadishkatam
Amethyst | Level 16

I am not sure of your expected output, you want the unique records per id1 and id2 without the duplicates I mean if there are a combination of dulicates on id1 and id2 then exclude them from flagging

 


data want;
set have;
by id1 id2;
if first.id2 and last.id2 then flag=1;
else flag=0;
run;
Thanks,
Jag

sas-innovate-2024.png

Join us for SAS Innovate April 16-19 at the Aria in Las Vegas. Bring the team and save big with our group pricing for a limited time only.

Pre-conference courses and tutorials are filling up fast and are always a sellout. Register today to reserve your seat.

 

Register now!

How to Concatenate Values

Learn how use the CAT functions in SAS to join values from multiple variables into a single value.

Find more tutorials on the SAS Users YouTube channel.

Click image to register for webinarClick image to register for webinar

Classroom Training Available!

Select SAS Training centers are offering in-person courses. View upcoming courses for:

View all other training opportunities.

Discussion stats
  • 8 replies
  • 69757 views
  • 1 like
  • 6 in conversation