[R] sink() and command files

[Malerba Giovanni]

Dear all,
if I type from the R command line the following:

ped <- read.table("R.ped", header=TRUE, sep=";",na.strings="x")
p <- glm(formula=Dust.mites ~ Graminacee+IgE.num+geneA,ped,family=binomial(logit))
sink (file="r.output")
summary(p)
sink()

everything works fine and 'r.output' is generated.
BUT , if I write (with an editor) the same lines into a command-file (i.e.
r.bat)  and from the R command line I type: source("r.bat")
the r.output is generated but it is empty.
What should I do to write a command-file that is able to re-direct the R
output to a file?
Many thanks,
Giovanni Malerba



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