[R] Two-way tables of data, etc
maj at waikato.ac.nz
Wed Sep 5 07:47:50 CEST 2001
At 06:42 AM 5-09-01 +0100, Prof Brian D Ripley wrote:
>xtabs(content ~ block + treat)
>is almost what you gave, better labelled.
>The obvious (to me) tools are xtabs and ftable to flatten arrays.
Yes, excellent. Thank you.
The beginning of the xtabs documentation is a little misleading, though, as it
> R Documentation
> Cross Tabulation
> Create a contingency table from cross-classifying factors, usually contained
> in a data frame, using a formula interface.
and I normally expect a contingency table to contain counts.
Dr Murray Jorgensen http://www.stats.waikato.ac.nz/Staff/maj.html
Department of Statistics, University of Waikato, Hamilton, New Zealand
Email: maj at waikato.ac.nz Fax +64-7 838 4155
Phone +64-7 838 4773 home phone +64-7 856 6705 Mobile +64-21 139 5862
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