Hello
I am not sure about your general aim, but from my previous experience on
combination of treatments, it can be more useful to create a matrix or
data.frame, which you can fulfill either with 1s and 0s, or with the values of
treatment, especially if you will need this data later for the analysis.
I can propose a small function, but only for the case of pair selection
treat=function(x,y){
data.frame(Treatment=x[-which(x==y)], Comparator=rep(y,times=length(x)-1))
}
> treat(c("t1","t2","t3","t4"),"t2")
Treatment Comparator
1 t1 t2
2 t3 t2
3 t4 t2
In this case you can define the list of names of treatments ant the comparator
each time you need, and you will get the result as a data frame in the way you
asked.
Good luck
Alex Levitchi
PhD in Genetics,
Bioinformatician at Laboratory of Bioinformatics
CBM, Area Science Park, Trieste, Italy
http://www.cbm.fvg.it/laboratories/bioinformatics_research
scientific researcher,
Center of Molecular Biology,
University of Academy of Sciences of Moldova
www.edu.asm.md
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
