Re: [R] write.table equivalent for lists?
serialize() and unserialize() in the base package
should do the job also and are usually quite a bit
faster than dput() and dget(). However, the format
is not easily read by other programs.
Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com
> -Original Message-
> From: r-help-boun...@r-project.org
> [mailto:r-help-boun...@r-project.org] On Behalf Of Greg Snow
> Sent: Monday, January 10, 2011 12:59 PM
> To: Rainer M Krug; R-help
> Subject: Re: [R] write.table equivalent for lists?
>
> How about dput and dget in the base package?
>
> --
> Gregory (Greg) L. Snow Ph.D.
> Statistical Data Center
> Intermountain Healthcare
> greg.s...@imail.org
> 801.408.8111
>
>
> > -Original Message-
> > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-
> > project.org] On Behalf Of Rainer M Krug
> > Sent: Monday, January 10, 2011 7:24 AM
> > To: R-help
> > Subject: [R] write.table equivalent for lists?
> >
> > -BEGIN PGP SIGNED MESSAGE-
> > Hash: SHA1
> >
> > 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
> > 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: rai...@krugs.de
> >
> > Skype: RMkrug
> > -BEGIN PGP SIGNATURE-
> > Version: GnuPG v1.4.10 (GNU/Linux)
> > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
> >
> > iEYEARECAAYFAk0rFocACgkQoYgNqgF2egoLMgCfQmZFnLx4Olkb55DtLKmuRXYY
> > yvoAnieTY3/CsGM9pqyoownLxgeuaDrd
> > =VOFu
> > -END PGP SIGNATURE-
> >
> > __
> > R-help@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide http://www.R-project.org/posting-
> > guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>
> __
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
__
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] write.table equivalent for lists?
How about dput and dget in the base package?
--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.s...@imail.org
801.408.8111
> -Original Message-
> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-
> project.org] On Behalf Of Rainer M Krug
> Sent: Monday, January 10, 2011 7:24 AM
> To: R-help
> Subject: [R] write.table equivalent for lists?
>
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
>
> 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
> 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: rai...@krugs.de
>
> Skype: RMkrug
> -BEGIN PGP SIGNATURE-
> Version: GnuPG v1.4.10 (GNU/Linux)
> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
>
> iEYEARECAAYFAk0rFocACgkQoYgNqgF2egoLMgCfQmZFnLx4Olkb55DtLKmuRXYY
> yvoAnieTY3/CsGM9pqyoownLxgeuaDrd
> =VOFu
> -END PGP SIGNATURE-
>
> __
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> and provide commented, minimal, self-contained, reproducible code.
__
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] write.table equivalent for lists?
On 2011-01-10 07:34, Rainer M Krug wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 01/10/2011 04:27 PM, Ivan Calandra wrote: I agree that the R-Core team has better things to do than that, but since it's already there, why not just add it to the base functions? Agree completely - and R.utils is not such an obscure package which nobody uses - so that these functions should be quite bug-free. Rainer Henrik write excellent code, maintains it well, and responds quickly. Can't ask for much more. As to putting this into pkg:base or pkg:utils, Ivan, have a look at the code of R.utils::loadObject; it's not quite trivial. Peter Ehlers __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] write.table equivalent for lists?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 01/10/2011 04:27 PM, Ivan Calandra wrote: > I agree that the R-Core team has better things to do than that, but > since it's already there, why not just add it to the base functions? Agree completely - and R.utils is not such an obscure package which nobody uses - so that these functions should be quite bug-free. Rainer > > Le 1/10/2011 16:19, Peter Ehlers a écrit : >> On 2011-01-10 06:45, Ivan Calandra wrote: >>> Why isn't it in R base? Good question... I'm definitely not the one able >>> to answer to it! >>> Maybe someone more involved in the development can? >>> Ivan >> >> Well, I suspect that Rainer has been on this list long >> enough to know the answer: >> Because no has convinced R-Core to implement it! >> >> While I might _occasionally_ find it useful, I don't >> mind if R-Core prefer to pursue other language enhancements. >> >> Peter Ehlers >> >>> >>> Le 1/10/2011 15:42, Rainer M Krug a écrit : -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 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? >> [...snip...] >> > - -- 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: rai...@krugs.de Skype: RMkrug -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk0rJw4ACgkQoYgNqgF2egreYACfTbfDH4E1SadVzq/WoZD9Tw9h A5EAnREavj5Wy6ru2ALJeKNc8kZPXIlM =OoKQ -END PGP SIGNATURE- __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] write.table equivalent for lists?
I agree that the R-Core team has better things to do than that, but since it's already there, why not just add it to the base functions? Le 1/10/2011 16:19, Peter Ehlers a écrit : On 2011-01-10 06:45, Ivan Calandra wrote: Why isn't it in R base? Good question... I'm definitely not the one able to answer to it! Maybe someone more involved in the development can? Ivan Well, I suspect that Rainer has been on this list long enough to know the answer: Because no has convinced R-Core to implement it! While I might _occasionally_ find it useful, I don't mind if R-Core prefer to pursue other language enhancements. Peter Ehlers Le 1/10/2011 15:42, Rainer M Krug a écrit : -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 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? [...snip...] -- Ivan CALANDRA PhD Student University of Hamburg Biozentrum Grindel und Zoologisches Museum Abt. Säugetiere Martin-Luther-King-Platz 3 D-20146 Hamburg, GERMANY +49(0)40 42838 6231 ivan.calan...@uni-hamburg.de ** http://www.for771.uni-bonn.de http://webapp5.rrz.uni-hamburg.de/mammals/eng/1525_8_1.php __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] write.table equivalent for lists?
On 2011-01-10 06:45, Ivan Calandra wrote: Why isn't it in R base? Good question... I'm definitely not the one able to answer to it! Maybe someone more involved in the development can? Ivan Well, I suspect that Rainer has been on this list long enough to know the answer: Because no has convinced R-Core to implement it! While I might _occasionally_ find it useful, I don't mind if R-Core prefer to pursue other language enhancements. Peter Ehlers Le 1/10/2011 15:42, Rainer M Krug a écrit : -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 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? [...snip...] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] write.table equivalent for lists?
Why isn't it in R base? Good question... I'm definitely not the one able
to answer to it!
Maybe someone more involved in the development can?
Ivan
Le 1/10/2011 15:42, Rainer M Krug a écrit :
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
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
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: rai...@krugs.de
Skype: RMkrug
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
- --
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: rai...@krugs.de
Skype: RMkrug
-BEGIN PGP SIGNATURE-
Version: GnuPG v1.4.10 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
iEYEARECAAYFAk0rGugACgkQoYgNqgF2egrnPwCfVM3v/pyJdZQ5f9Fd9w9Mnsfm
dDYAnAgkcuZqcI+QG6YRU2pEui6PvE/Q
=4j0d
-END PGP SIGNATURE-
--
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. Säugetiere
Martin-Luther-King-Platz 3
D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calan...@uni-hamburg.de
**
http://www.for771.uni-bonn.de
http://webapp5.rrz.uni-hamburg.de/mammals/eng/1525_8_1.php
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] write.table equivalent for lists?
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
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
> 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: rai...@krugs.de
>
> Skype: RMkrug
>>
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
>>
- --
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: rai...@krugs.de
Skype: RMkrug
-BEGIN PGP SIGNATURE-
Version: GnuPG v1.4.10 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
iEYEARECAAYFAk0rGugACgkQoYgNqgF2egrnPwCfVM3v/pyJdZQ5f9Fd9w9Mnsfm
dDYAnAgkcuZqcI+QG6YRU2pEui6PvE/Q
=4j0d
-END PGP SIGNATURE-
__
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] write.table equivalent for lists?
Hi,
If I understood you correctly, you can use saveObject()/loadObject()
from package R.utils, like this:
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 :
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
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
Cell: +27 - (0)8 39 47 90 42
Fax (SA): +27 - (0)8 65 16 27 82
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Ivan CALANDRA
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Biozentrum Grindel und Zoologisches Museum
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[R] write.table equivalent for lists?
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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
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