[R] How to get a list work in RData file

[Prof Brian Ripley]

On Mon, 15 Aug 2005, Xiyan Lon wrote:

> Dear R-Helper,
(There are quite a few of us.)

> I want to know how I get a list  work which I saved in RData file. For
> example,

I don't understand that at all, but it looks as if you want to save an 
unevaluated call, in which case see ?quote and use something like

xyadd <- quote(test.xy(x=2, y=3))

load and saving has nothing to do with this: it doesn't change the meaning 
of objects in the workspace.

> > test.xy <- function(x,y) {
> +    xy <- x+y
> +    xy
> + }
> >
> > xyadd <- test.xy(x=2, y=3)
> > xyadd
> [1] 5
> > x1 <- c(2,43,60,8)
> > y1 <- c(91,7,5,30)
> >
> > xyadd1 <- test.xy(x=x1, y=y1)
> > xyadd1
> [1] 93 50 65 38
> > save(list = ls(all=TRUE), file = "testxy.RData")
> > rm(list=ls(all=TRUE))
> > load("C:/R/useR/testxy.RData")
> > ls()
> [1] "test.xy" "x1"      "xyadd"   "xyadd1"  "y1"
> >
> > ls.str(pat="xyadd")
> xyadd :  num 5
> xyadd1 :  num [1:4] 93 50 65 38
> >
>
> When I run, I know the result like above
> > xyadd
> [1] 5
> > xyadd1
> [1] 93 50 65 38
> >
> what I want to know, is there any function to make the result like:
>
> > xyadd
>
>         test.xy(x=2, y=3)
>
> and
>
> > xyadd1
>
>        test.xy(x=x1, y=y1)

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595