I need to group some subjects according to two
variables (var1, var2)
I have a data frame that looks something like this:
Subject var1 var2
1 400 150
2 320 100
3 580 600
4 145 789
Each suject would fall into one of 2 categories ('A'
or 'B'). I want to find (and see) all the possible
combinations of letter assignment that exist, but
every combination needs to have an equal amount of
subjects categorized as 'A' or 'B'(eg. if I have 20
subjects there should be 10 assigned with letter 'A'
and 10 with letter 'B')
Thank you in advance for any hints,
Judith
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