>
>
> I am new to this group - joined today. I am in because i have an assignment
> to do using R => microarray analysis using affy (bioconductor).
>
> while reading some tutorials, i came across this and i am stuck. i want to
> understand it and would appreciate if anyone can tell me.
>
> design <- model.matrix(~ -1+factor(c(1,1,2,2,3,3)))
>
> can someone break down this code and explain to me what the "~", and the
> "-1+factor" are doing? sometimes i see codes without some of these things.
>
> thanks, would appreciate if you can explain it in the simplest way you can. i
> am a pure molecular biologist and trying to learn this new monster called R.
> :-)
>
> thanks,
>
> daniel
[[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.
