Hi everybody,
I would like to compute the mean for 1 variable between the rows with
the same levels.
For example, with the dataset below:
Factor1 Factor2 Value
A X 1
A X 2
A Y 3
A Y 4
B X 5
B X 6
B Y 7
B Y 8
I would like to get:
Factor1 Factor2 Value
A X 1.5
A Y 3.5
B X 5.5
B Y 7.5
Up to now, I worked in Statistica and Systat, and it was called "column
statistics" in Statistica (and I had a script with the "BY" function in
Systat).
Of course it is a simplified case. For my dataset I have 4 factors and
15 variables, so a general method would be nice. However, my skills are
not that great, so if you could please give some explanations (I mean
other than what is in the ?function of course).
Thanks a lot in advance
Ivan
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