BookmarkSubscribeRSS Feed
🔒 This topic is solved and locked. Need further help from the community? Please sign in and ask a new question.
Dingdang
Fluorite | Level 6

Hi,

I have a dataset which looks like:

data have;

infile datalines;

input numbers;

datalines;

1

1

.

2

3

4

.

5

5

6

7

7

;

In case the previous obervation is not . and the present observation equals to the previous value, then i would like to set the current value to . So what I would like to have is

data want;

infile datalines;

input numbers;

datalines;

1

.

.

2

3

4

.

5

.

6

7

.

;

Can someone help me solve this problem? Many thanks in advance!

BR  Dingdang

1 ACCEPTED SOLUTION

Accepted Solutions
Haikuo
Onyx | Level 15

lag() or dif();

data have;

     infile datalines;

     input numbers;

     datalines;

1

1

.

2

3

4

.

5

5

6

7

7

;

data want;

     set have;

     if dif(numbers)=0 then

           numbers=.;

run;

View solution in original post

2 REPLIES 2
Haikuo
Onyx | Level 15

lag() or dif();

data have;

     infile datalines;

     input numbers;

     datalines;

1

1

.

2

3

4

.

5

5

6

7

7

;

data want;

     set have;

     if dif(numbers)=0 then

           numbers=.;

run;

Ksharp
Super User
data have;
     infile datalines;
     input numbers;
     datalines;
1
1
.
2
3
4
.
5
5
6
7
7
;
run;
data want;
 set have;
 by numbers notsorted;
 if not first.numbers then numbers=.;
 run;

 data want1;
 set have;
 by numbers notsorted;
 if numbers=lag(numbers) then numbers=.;
 run;


Xia Keshan

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!

What is Bayesian Analysis?

Learn the difference between classical and Bayesian statistical approaches and see a few PROC examples to perform Bayesian analysis in this video.

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
  • 2 replies
  • 802 views
  • 4 likes
  • 3 in conversation