topic Re: How to balance the "unbalanced data" and transpose the format in SAS Programming

How to balance the "unbalanced data" and transpose the format

Jonate_H — Sat, 24 May 2014 15:40:52 GMT

I have unbalanced data: each ID in each year have different number of observations (in total 12 years and 50 different IDs).

I try to:

step 1, make each ID in each year have the same number of observations (6 obs/year), and set income as missing value for those missing months.

step 2, transpose the format of the "balanced" data set.

(for step 1, I tried to split data into small ones by id and by year, operate on each small data set, and then merge them back (the process is very inefficient); for step 2, I find something about "proc transpose" on the website is relevant, but haven't found the right way to do it)

Re: How to balance the "unbalanced data" and transpose the format

FriedEgg — Sat, 24 May 2014 15:57:28 GMT

You can perform both of these steps using PROC TRANSPOSE

proc transpose data=have out=want;

by year month;

var income;

id id;

run;

Re: How to balance the "unbalanced data" and transpose the format

Jonate_H — Sat, 24 May 2014 16:25:11 GMT

That's pretty neat, thank you so much!

By the way, is there any easy way to do step 1? (I mean, balance the data but don't transpose the format)... Looks like I can re-transpose the data after running your code, am I right?

Re: How to balance the "unbalanced data" and transpose the format

FriedEgg — Sat, 24 May 2014 21:10:36 GMT

You could transpose the data back again, yes. You could write a datastep to do it, but I do not really see the benefit of having that intermediate data.

Re: How to balance the "unbalanced data" and transpose the format

Jonate_H — Sat, 24 May 2014 21:30:18 GMT

You're right. Thanks.

Re: How to balance the "unbalanced data" and transpose the format

MY_ — Wed, 16 Mar 2016 03:56:32 GMT

Hi FriedEgg,

I am working on an analysis that needs me to get the intermediate data, that is, only conduct Step 1 in the original post. Do you know how I can do that?

Thank you!

Re: How to balance the "unbalanced data" and transpose the format

FriedEgg — Wed, 16 Mar 2016 18:33:16 GMT

@MY_ it would serve you best to create a new post specific to your question.

Re: How to balance the "unbalanced data" and transpose the format

MY_ — Wed, 16 Mar 2016 18:36:55 GMT

Hi FriedEgg, I have sent SAS support an email and got the answers. Thank you for your kindly reply 🙂