[R] write.table equivalent for lists?

[Rainer M Krug]

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On 01/10/2011 03:35 PM, Ivan Calandra wrote:
> Hi,
> 
> If I understood you correctly, you can use saveObject()/loadObject()
> from package R.utils, like this:

Correct - thanks - that is what I was looking for.

But why is no such function in R base?
> 
> library(R.utils)
> saveObject(x, "x.Rbin")
> rm(x)
> y <- loadObject("x.Rbin")
> 
> HTH,
> Ivan
> 
> Le 1/10/2011 15:24, Rainer M Krug a écrit :
> Hi
> 
> I am writing simulations in R, and quite regularly, I have to save lists
> and objects to HDD and load it later again.
> 
> So I am wondering: why is there no function to write lists (and S3, S4
> objects) onto HDD WITHOUT keeping the name? What I mean is:
> 
> For data.frames I can use
> 
> x<- data.frame(x = runif(10))
> write.table(x, "x.txt)
> rm(x)
> 
> y<- read.table("x.txt")
> 
> to load it into y.
> 
> But for lists and S3, S4 objects, I have to use save() and load():
> 
> x<- list(x=1:10, y=letters(1:10))
> save(x, file="x.rdata")
> rm(x)
> 
> load("x.rdata") #1
> y<- x          #2
> rm(x)           #3
> 
> to load it into y.
> I don't mind the binary of save - what I am really missing is a command
> which combines lines #1, #2 and #3.
> 
> I know - I could write my own
> 
> save.list<- function(x, file) {
>    save(s, file=file)
> }
> 
> load.list<- function(file) {
>    load(file)
>    return(x)
> }
> 
> which I could then use as:
> 
> x<- list(x=1:10, y=letters(1:10))
> save.list(x, "test.rdata")
> 
> rm(x)
> 
> y<- load.list("test.rdata")
> 
> but: why is there not such a function? Am I missing something here?
> 
> Cheers,
> 
> Rainer
> 
> -- Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
> Biology, UCT), Dipl. Phys. (Germany)
> 
> Centre of Excellence for Invasion Biology
> Natural Sciences Building
> Office Suite 2039
> Stellenbosch University
> Main Campus, Merriman Avenue
> Stellenbosch
> South Africa
> 
> Tel:        +33 - (0)9 53 10 27 44
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> email:      Rainer at krugs.de
> 
> Skype:      RMkrug
>>
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- -- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
Biology, UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
Natural Sciences Building
Office Suite 2039
Stellenbosch University
Main Campus, Merriman Avenue
Stellenbosch
South Africa

Tel:        +33 - (0)9 53 10 27 44
Cell:       +27 - (0)8 39 47 90 42
Fax (SA):   +27 - (0)8 65 16 27 82
Fax (D) :   +49 - (0)3 21 21 25 22 44
Fax (FR):   +33 - (0)9 58 10 27 44
email:      Rainer at krugs.de

Skype:      RMkrug
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