On 20.05.2010 19:16, Biau David wrote:
Hi,
I am trying to describe a data.frame by obtaining multiple crosstable summary
statistics at once. I have tried table, xtab, crosstable, summaryBy and
describe but none of these functions seems to allow muliple conparisons at once.
Here, is what I would like to do:
I have, for instance, age, sex (M and F), grade (1, 2, 3) and site (limb,
trunk) and I want the, for instance, following summary statistics:
- age (mean, SD) for males and age for females
- age for grade 1, grade2, and grade 3
- age for site limb, site trunk
- sex (count, proportions) for grade 1, grade2, and grade 3
- sex (count, proportions) site limb, site trunk (already have sex/age above)
- grade (count, proportions) for site limb, site trunk (already have grade/sex
and grade/age above)
a
lso, I want each of these not crossed by any others (mean overall age, numbers
of males, etc) which could be seen as each crossed with its own.
I have at least 10 variables, continuous, categorical ordered and non ordered.
I don't want any tests.
Any idea?
Since all of the tables you want to get are somehow specific, I'd do it
step by step.....
Uwe Ligges
David Biau.
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