Combinations of x variables.

[Mark Webb-5]

Marta G-Granero wrote a very useful piece of syntax that computes ALL
combinations of  variables.

So, for example, if a respondent bought 3 items a,b,c this syntax will
report this as a combination of 3 items.i.e. a,b,c - if 4 were bought -
a,b,c,d.  [a,b,c = c,b,a - etc]

But it can also be viewed as 3 combinations of 2 items - a,b & a,c & b,c
rather than a,b,c

Is there syntax out there that can compute combinations of x from y
variables rather than taking each respondents repertoire into account.

So if I have 6 variables I would like know all the combinations of 2,
all the combinations of 3, all the combinations of 4, etc.

Regards

--
Mark Webb

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