Message-ID: <15055.3179.25393.789439@mithrandir.hornik.net>
Date: 2001-04-07T12:47:39Z
From: Kurt Hornik
Subject: Still need help w/ making a table
In-Reply-To: <Pine.LNX.4.21.0104031125010.13603-100000@nujoma.perrins>
>>>>> Andrew Perrin writes:
> Greetings again. I'm still trying to coerce a pile of data into a
> frequency table format. I've managed to do so using perl, so I now have a
> tab-delimited file that contains the contingency table I'm trying to use:
> Group var1 var2 ... varn
> B 42 11 3
> C 44 1 12
> ...
> X 12 0 19
> I can read the table in using read.table(), but I end up with a data
> frame, and when I try to use as.table() it says: Error in
> as.table.default(df) : cannot coerce into a table
> What I need is a table object upon which I can perform a chi-square
> analysis.
> Any help will be very much appreciated!
I am not sure about the above ``contingency'' table (does var_i mean
that the corresponding column holds the counts for variable i or do the
columns correspond to levels?). In any case, pls have a look at the
documentation for xtabs and read.ftable. The latter is meant for
reading in contingency tables in various ``flat'' formats.
-k
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