That's true; however,
CrossTable(x,x)
does give the desired counts and proportions in the margin
line at the bottom. See the row labelled Column Total in
the following example based on Carlos' vector:
> sex<-c(1,2,2,1,1,2,2,2)
> CrossTable(sex,sex)
Cell Contents
|-----------------|
| N |
| N / Row Total |
| N / Col Total |
| N / Table Total |
|-----------------|
Total Observations in Table: 8
| sex
sex | 1 | 2 | Row Total |
-------------|-----------|-----------|-----------|
1 | 3 | 0 | 3 |
| 1.000 | 0.000 | 0.375 |
| 1.000 | 0.000 | |
| 0.375 | 0.000 | |
-------------|-----------|-----------|-----------|
2 | 0 | 5 | 5 |
| 0.000 | 1.000 | 0.625 |
| 0.000 | 1.000 | |
| 0.000 | 0.625 | |
-------------|-----------|-----------|-----------|
Column Total | 3 | 5 | 8 |
| 0.375 | 0.625 | |
-------------|-----------|-----------|-----------|
---
Date: Sun, 29 Feb 2004 13:48:27 -0600
From: Marc Schwartz <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>,R-Help <[EMAIL PROTECTED]>
Subject: RE: [R] Proportions again
On Sun, 2004-02-29 at 12:40, Gabor Grothendieck wrote:
> Several people have alrady answered you by this time and
> in addition to their answers you might also be interested
> in CrossTable in package gregmisc.
Gabor,
Thanks for pointing out CrossTable().
Just as a quick heads up/clarification for Carlos, CrossTable() is
designed to cross-tabulate two vectors and generate counts,
row/column/table proportions and other results from the 2 dimensional
cross-tab in a (hopefully) nicely formatted fashion.
It is not presently designed to handle generating proportions from the
tabulation of a single vector with repeating values (such as Carlos'
example) and will generate an error message if a single vector is
passed.
In that scenario, as many folks have already recommended, the
combination of table() and prop.table() would be preferred.
HTH,
Marc Schwartz
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