[R] filtering lines in a table

[Uli Flenker; Raum 704]

Alexandre,

"help(boxplot)" among other things says:


Usage:

     ...

     boxplot.formula(formula, data = NULL, subset, na.action, ...)

     ...

So you can use

> boxplot(table$X ~ table$A,subset(table$B==given.value))

Any logical expression should work.

Best ...

        Uli Flenker
        Institute of Biochemistry
        German Sports University Cologne
        Carl-Diem-Weg 6

        50933 Cologne / Germany

        Phone 0049/0221/4982-493


On Sat, 9 Dec 2000, Alexandre Fayolle wrote:

> Hello,
> 
> I realize this is probably a dumb question, but I think there must be an
> easy way to do this with R and I was not able to find it in the doc. 
> 
> I have a table (read from a file with read.table), with two factor
> columns, table$A and table$B, and a numerical column, table$X. I wish to
> make a boxplot of  (table$X ~ table$A) for a given value of B. Is there
> a way to express this with a formula, or is it necessary to manually
> extract the right lines in the table? In that case, what is the best way
> to do so?
> 
> Thanks for your help
> 
> 
> Alexandre "R newby" Fayolle
> 
> -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
> r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
> Send "info", "help", or "[un]subscribe"
> (in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
> _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
> 

-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._