[R] all values from a data frame

[Arne.Muller@aventis.com]

Hello,

I've a data frame with 15 colums and 6000 rows, and I need the data in a
single vector of size 90000 for ttest. Is there such a conversion function in
R, or would I have to write my own loop over the colums?

	thanks for your help + kind regards

	Arne