R help - Dec 2005 - store and retrieve object names in a vector

hi netters,

suppose i have a series of objects X1, X2, B1,C1........... they all have 
the same dimensions. i want to combine into one by using cbind:
y<-cbind(X1,X2,B1,C1.....)

but i don't want to type the names of these objects one by one. instead, 
i've put their names into a vector:
x<-c("X1","X2","B1","C1",....)

i used y<-cbind(x). but what i got is a matrix of the names, not a 
combination of matrices.

anybody know how to handle this?

thanks a lot!

try:

y <- sapply(x, function(x) eval(parse(text=x)))


zhihua li a 仺仸crit :
> hi netters,
>
> suppose i have a series of objects X1, X2, B1,C1........... they all
> have the same dimensions. i want to combine into one by using cbind:
> y<-cbind(X1,X2,B1,C1.....)
>
> but i don't want to type the names of these objects one by one.
> instead, i've put their names into a vector:
> x<-c("X1","X2","B1","C1",....)
>
> i used y<-cbind(x). but what i got is a matrix of the names, not a
> combination of matrices.
>
> anybody know how to handle this?
>
> thanks a lot!
>
>------------------------------------------------------------------------
>
>______________________________________________
>R-help at 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
>

zhihua li wrote:
> hi netters,
> 
> suppose i have a series of objects X1, X2, B1,C1........... they all 
> have the same dimensions. i want to combine into one by using cbind:
> y<-cbind(X1,X2,B1,C1.....)
> 
> but i don't want to type the names of these objects one by one.
instead,
> i've put their names into a vector:
x<-c("X1","X2","B1","C1",....)
Something like:

do.call(rbind, lapply(x,get)) # not tested
should work!

Kjetil
> 
> i used y<-cbind(x). but what i got is a matrix of the names, not a 
> combination of matrices.
> 
> anybody know how to handle this?
> 
> thanks a lot!
> 
> 
> ------------------------------------------------------------------------
> 
> ______________________________________________
> R-help at 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