colMeans in a data.frame with numeric and character data

try this:

dat <- data.frame(x = rnorm(10), y = rexp(10), z = letters[1:10])
colMeans(data.matrix(dat[sapply(dat, is.numeric)]))


I hope it helps.

Best,
Dimitris

----
Dimitris Rizopoulos
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
      http://www.student.kuleuven.be/~m0390867/dimitris.htm


Quoting Diogo Andr? Alagador <dalagador at armail.pt>:

Hi all,

I would like to know if it is posible by, someway, to get colMeans from
a data.frame with numeric as well as character data, dispersed all over
the object. Note that I would like to get colMeans neglecting character
data.

I am really in need of some function proceeding in that way

All the best

Diogo Andr? Alagador

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