[R] binding vectors or matrix using their names

[Patrick Burns]

I think you are looking for the eval-parse-text idiom:

eval(parse(text=paste("cbind(", paste(my.names, collapse=", "), ")")))

Patrick Burns

Burns Statistics
patrick at burns-stat.com
+44 (0)20 8525 0696
http://www.burns-stat.com
(home of S Poetry and "A Guide for the Unwilling S User")

Stephane DRAY wrote:

> Hi Tom,
>
> Your approach did not work,
>
> > do.call("cbind", as.list(my.names))
>      [,1] [,2]
> [1,] "x"  "x2"
>
> but it helps me a lot to find the good one:
>
> do.call("cbind", as.list(parse(text=my.names)))
>
> Thanks,
>
>
> At 14:56 24/03/2004, Tom Blackwell wrote:
>
>> I believe the syntax is
>>
>> result <- do.call(cbind, as.list(my.names))
>>
>> Haven't checked this on your example, though.
>>
>> -  tom blackwell  -  u michigan medical school  -  ann arbor  -
>>
>> On Wed, 24 Mar 2004, Stephane DRAY wrote:
>>
>> > Hello list,
>> > I have two vectors x and x2:
>> >
>> > x=runif(10)
>> > x2=runif(10)
>> >
>> > and one vectors with their names :
>> >
>> > my.names=c("x","x2")
>> >
>> > I would like to cbind these two vectors using their names contained 
>> in the
>> > vector my.names.
>> > I can create a string with comma
>> > ncomma=paste(my.names,collapse=",")
>> >
>> > and now, I just need a function to transform this string into a 
>> adequate
>> > argument for cbind:
>> >
>> > cbind(afunction(ncomma))
>> >
>> > Is there in R a function that can do the job ? If not, how can I do 
>> it ??
>> >
>> > Thanks in advance,
>> > Sincerely.
>> >
>> >
>> > Stéphane DRAY
>> > 
>> -------------------------------------------------------------------------------------------------- 
>>
>> >
>> > Département des Sciences Biologiques
>> > Université de Montréal, C.P. 6128, succursale centre-ville
>> > Montréal, Québec H3C 3J7, Canada
>> >
>> > Tel : 514 343 6111 poste 1233
>> > E-mail : stephane.dray at umontreal.ca
>> > 
>> -------------------------------------------------------------------------------------------------- 
>>
>> >
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>
>
> Stéphane DRAY
> -------------------------------------------------------------------------------------------------- 
>
> Département des Sciences Biologiques
> Université de Montréal, C.P. 6128, succursale centre-ville
> Montréal, Québec H3C 3J7, Canada
>
> Tel : 514 343 6111 poste 1233
> E-mail : stephane.dray at umontreal.ca
> -------------------------------------------------------------------------------------------------- 
>
> Web                                          
> http://www.steph280.freesurf.fr/
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! 
> http://www.R-project.org/posting-guide.html
>
>