On Wed, 8 Sep 2004 [EMAIL PROTECTED] wrote: > Hi all, > > I have two questions stated below: > > 1. How to draw an observation uniformly from a given data? > > For example, I have a dataset (or dataframe) with 10 observations (with a > set of variables) and I want to "uniformly" select an observation from this > given dataset, that is, the probability of selecting each observation is > 1/10.
sample(1:10,3,replace=TRUE) > > 2. How to do this "combinations"? > > source vector = (1,2) > the length of the target vector = 3 > > My expected outputs should be: > 111, 112, 121, 122, 211, 212, 221, 222. sample(c(1,2),3,replace=TRUE) Dave -- Dave Forrest [EMAIL PROTECTED] (804)684-7900w [EMAIL PROTECTED] (804)642-0662h http://maplepark.com/~drf5n/ ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html