Re: [R] dynamic object names?

From: John Charles Considine <vinum_at_iinet.net.au>
Date: Mon 19 Sep 2005 - 20:42:12 EST

On Mon, 2005-09-19 at 11:38 +0200, Uwe Ligges wrote:
> samir@guidi.ch wrote:
>
> > I am trying to extract data from a matrix. Let's say that i am interested in
> > extracting
> > rows from a 4x4 matrix. Instead of giving a fix name to these 4 rows I would
> > like to add a number to prefix. As result I should get 4 objects named:
> >
> > prefix_1
> > prefix_2
> > prefix_3
> > prefix_4
Samir,
In addition to the other comments, part of the problem may be that you can't assign the character '_' to standard objects. Could you use '.' instead?

JC

> >
> > I attepted to solve the problem with a loop, but without success. Any hints??
>
>
> 1. In fact, you do not really want it.
> 2. You want to use "<-" rather than "->" for assigments. Reading your
> code is really hard when you are using this non-conventional way.
> 3. In order to answer your question: This is the FAQ "How can I turn a
> string into a variable?". The posting guide asks you to read these FAQs
> before sending questions to R-help. Please do so.
>
> Uwe Ligges
>
>
>
>
> >
> >>matrix(LETTERS[1:16], ncol=4) -> MM
> >>MM
> >
> > [,1] [,2] [,3] [,4]
> > [1,] "A" "E" "I" "M"
> > [2,] "B" "F" "J" "N"
> > [3,] "C" "G" "K" "O"
> > [4,] "D" "H" "L" "P"
> >
> >
> > for (xxx in 1:4) {
> > MM[xxx,] -> prefix_xxx;
> > }
> >
> >
> > Thanks
> >
> > samir
> >
> > ______________________________________________
> > R-help@stat.math.ethz.ch mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
>
> ______________________________________________
> R-help@stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html



R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Wed Sep 21 02:49:44 2005

This archive was generated by hypermail 2.1.8 : Fri 03 Mar 2006 - 03:40:18 EST