How does one consolidate into a single record with a frequency weight ?

[Rose Matthews]

Hi I’ve got 4 score ordinal variables each with a score of 1-5 for procedure = 1 and procedure =0


I’ve been advised to do the following:


Those with an identical response and covariate vector can be consolidated into a single record with a frequency weight,


Does this mean:

Duplicates tag(score1 score2 score3 score4 procedure), gen(duplicates)

However , then how do I introduce - frequency weight- ?

1. do i just drop those which aren’t unique values ?
2. Or do i keep the whole dataset withoit dropping anytjing and use

contract score1 score2 score3 score4 procedure, freq[fw]

[Clyde Schechter]

It's the last one. Use the -contract- command. BUT, the -freq()- option uses parentheses, not square brackets, to bind its argument.

[Rose Matthews]

Thanks for this, I’ve managed to solve my previous problems with data… now onto graph plotting