[R] Still need help w/ making a table

Kurt Hornik Kurt.Hornik at ci.tuwien.ac.at
Sat Apr 7 14:47:39 CEST 2001

>>>>> 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.

r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch

More information about the R-help mailing list