Displaying 1 result from an estimated 1 matches for "tp26312115p26312115".
2009 Nov 12
2
By processing on two variables at once?
...need, for instance, mean(value) by x-y combination:
x y z value
1 1 1 10
1 1 2 20
1 2 1 30
with results:
x y mean(value)
1 1 15
1 2 30
Any help?
Thanks,
~Zack
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