| To: | s-news@lists.biostat.wustl.edu |
|---|---|
| Subject: | random partitioning of a data frame |
| From: | Wei Ye <weiye1@yahoo.com> |
| Date: | Fri, 18 Jan 2008 16:42:02 -0800 (PST) |
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Dear S-news members:
I am new to S-plus programing.I would really
appreciate it if somebody can help me with this.
I took a random sample from a large data frame x
using:
samp1<-x[sample(1:nrow(x), 100,replace=F),].
But I also want to keep the observations that were not
selected. How do I separate the observations that were
sampled and those that were not sampled? Thanks a lot.
Wei
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