[R] data manipulation help

[Leeds, Mark (IED)]

below works on you example but someone will have something more elegant.

zeroindices<-which(a == 0)
rep(1:length(zeroindices),c(diff(zeroindices),(length(a)-zeroindices[len
gth(zeroindices)]+1)))






-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Zheng Lu
Sent: Tuesday, August 28, 2007 5:00 PM
To: r-help at stat.math.ethz.ch
Subject: [R] data manipulation help

Dear All:

I have a dataset like
A=c(0,12,34,5,6,0,4,5,6,0,12,3,4,8,7,0,4,3,5,0,.......),I want to add a
column to this dataset, it must be in
B=c(1,1,1,1,1,2,2,2,2,3,3,3,3,3,3,4,4,4,4,5,......), How can I create B
based on the sequence of A. Appreciate.


Zheng

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