you could use something like the following:
expand.grid(rep(list(1:3), 4))
I hope it helps.
Best,
Dimitris
Jose Luis Aznarte M. wrote:
Hi there! I can't find any information about creating combinations
with repetitions in R. The function combn() does create combinations,
but _without_ repetitions.
Here is what I need to do:
svIter <- 1000
xx <- matrix(rnorm(m*n), c(m, n))
sequence <- seq(range(xx)[1], range(xx)[2], length.out = svIter^(1/q))
expand.grid(secuence, secuence, .../q times/..., secuence)
That is, I need a grid which covers a q-dimensional space with range
range(xx) for each dimension, and a total number of points close to
svIter. My problem could be solved by writting the expand.grid call at
runtime, but I think that is not very elegant and, overall, I don't know
how to do that. If combn() accepted repetitions, it'd be solved also.
Any help will be greatly appreciated.
Bests,
-- --
Jose Luis Aznarte M. http://decsai.ugr.es/~jlaznarte
Department of Computer Science and Artificial Intelligence
Universidad de Granada Tel. +34 - 958 - 24 04 67
GRANADA (Spain) Fax: +34 - 958 - 24 00 79
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--
Dimitris Rizopoulos
Biostatistical Centre
School of Public Health
Catholic University of Leuven
Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://perswww.kuleuven.be/dimitris_rizopoulos/
Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
