[R] Interaction of a dynamic number of factors

[Gabor Grothendieck]

Try this:

> ftable(CO2[1:3])
                  Treatment nonchilled chilled
Plant Type
Qn1   Quebec                         7       0
      Mississippi                    0       0
Qn2   Quebec                         7       0
      Mississippi                    0       0
Qn3   Quebec                         7       0
      Mississippi                    0       0
Qc1   Quebec                         0       7
      Mississippi                    0       0
Qc3   Quebec                         0       7
      Mississippi                    0       0
Qc2   Quebec                         0       7
      Mississippi                    0       0
Mn3   Quebec                         0       0
      Mississippi                    7       0
Mn2   Quebec                         0       0
      Mississippi                    7       0
Mn1   Quebec                         0       0
      Mississippi                    7       0
Mc2   Quebec                         0       0
      Mississippi                    0       7
Mc3   Quebec                         0       0
      Mississippi                    0       7
Mc1   Quebec                         0       0
      Mississippi                    0       7
>


On Mon, Apr 13, 2009 at 8:39 AM, Nigel Birney <nan23 at cam.ac.uk> wrote:
>
> Hi, I have a dynamic table structure consisting of N factors (e.g. columns
> Factor_1, Factor_2,..Factor_N).
>
> I want to construct a table that has as rows the level combinations of
> factors F_1..F_n-1, and as columns the levels of the factor Fn. The cells of
> the table would contain the number of cases that correspond to these level
> combinations. How can I do this?
>
> --
> View this message in context: http://www.nabble.com/Interaction-of-a-dynamic-number-of-factors-tp23021835p23021835.html
> Sent from the R help mailing list archive at Nabble.com.
>
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