[R] concatenating lists
Jan Goebel
jgoebel at diw.de
Thu Mar 15 12:35:18 CET 2001
Hello Faheem,
On Wed, 14 Mar 2001, Faheem Mitha wrote:
>
> Dear People,
>
> I have been trying to perform concatenation operations on lists without
> success. Consider the following example.
>
> > x <- runif(2)
> > y <- runif(2)
> > z <- runif(2)
> > xy <- list(x,y)
> > xyz <- list(x,y,z)
>
> I want to have a function foo such that foo(xy,z) is the same as xyz. This
> appears not to be as easy as I thought, though there must be a way.
Maybe this can give you a starting point.
I guess their are more elegant ways to do this ...
> clist <- function (liste, x) {
+
+ tmp <- paste("list(",
+ paste(paste("liste[[",1:length(liste),"]]",sep=""),
+ collapse=","),",x)",sep="")
+ eval(parse(text=tmp))
+ }
>
> clist(xy,z)
[[1]]
[1] 0.6855152 0.5541156
[[2]]
[1] 0.19300487 0.07686829
[[3]]
[1] 0.4915225 0.9025518
best
jan
--
+-----------------------------------
Jan Goebel (mailto:jgoebel at diw.de)
DIW Berlin
Longitudinal Data and Microanalysis
Königin-Luise-Str. 5
D-14195 Berlin -- Germany --
phone: 49 30 89789-377
+-----------------------------------
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
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
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
More information about the R-help
mailing list