Error in proc transpose

[Marjolein]

Hi,

I have data arranged in the following way:

ID	Food	intake
1	food1	32
1	food2	12
1	food3	69
2	food1	22
2	food2	78
2	food3	56

Using the PROC TRANSPOSE procedure, I want to structure it in this way:

ID	food1	food2	food3
1	32	12	69
2	22	78	56

I have used the following code to restructure:

proc transpose data=have out=want;

id food;

var intake;

by ID;

run;

However, I repeatedly get the following error message, for each food:

"The ID value "food1" occurs twice in the same BY group."

The output seems OK after some random checks, so I wonder why I get this error message. Does it have to do with the length of the character variables (the actual strings are longer than the length of 'food1' etc).

Hope someone can help me out!

[Ksharp · Accepted solution]

Then your data must have something like :



ID	Food	intake
1	food1	32
1	food1	22
1	food1	12
1	food2	12
1	food3	69


use PROC SORT nodupkey; by id food ;run; to have unique Key value.

[Marjolein]

It worked, thanks a lot!

[art297]

If you have more than one record per ID/food combination, I would first ask why. While @Ksharp showed you a way to eliminate duplicate ID/food combinations, possibly you need to run proc summary first to sum the intake values for each ID/food combination.

Art, CEO, AnalystFinder.com