[Rd] A doubt about substitute() after delayedAssign()
Hello,
?delayedAssign presents substitute() as a way to look at the expression
in the promise. However,
msg <- "old"
delayedAssign("x", msg)
msg <- "new!"
x #- new!
substitute(x) #- x (was 'msg' ?)
Here, we just got 'x'... shouldn't we got 'msg'?
Same result when the promise is not evaluated yet:
delayedAssign("x", msg)
substitute(x)
In a function, that works:
foo <- function (x = msg) substitute(x)
foo()
Did I misunderstood something? It seems to me that substitute() does not
behaves as documented for promises created using delayedAssign().
Best,
Philippe
--
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( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology of Aquatic Systems
) ) ) ) ) Mons University, Belgium
( ( ( ( (
..
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Re: [Rd] A doubt about substitute() after delayedAssign()
On 12-04-29 3:30 AM, Philippe Grosjean wrote:
> Hello,
>
> ?delayedAssign presents substitute() as a way to look at the expression
> in the promise. However,
>
> msg<- "old"
> delayedAssign("x", msg)
> msg<- "new!"
> x #- new!
> substitute(x) #- x (was 'msg' ?)
>
> Here, we just got 'x'... shouldn't we got 'msg'?
>
> Same result when the promise is not evaluated yet:
>
> delayedAssign("x", msg)
> substitute(x)
>
> In a function, that works:
>
> foo<- function (x = msg) substitute(x)
> foo()
>
> Did I misunderstood something? It seems to me that substitute() does not
> behaves as documented for promises created using delayedAssign().
I don't think this is well documented, but substitute() doesn't act the
same when its "env" argument is the global environment. So this works
the way you'd expect:
e <- new.env()
msg <- "old"
delayedAssign("x", msg, assign=e)
msg <- "new"
e$x
substitute(x, e)
I forget what the motivation was for special-casing globalenv().
Duncan Murdoch
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[Rd] creating a package in R
Please give me the necessary links that permits me to create my own package inR -- View this message in context: http://r.789695.n4.nabble.com/creating-a-package-in-R-tp4596411p4596411.html Sent from the R devel mailing list archive at Nabble.com. __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] creating a package in R
http://cran.r-project.org/doc/manuals/R-exts.pdf Ships with every distribution of R Michael On Apr 29, 2012, at 10:08 AM, nossa wrote: > Please give me the necessary links that permits me to create my own package > inR > > -- > View this message in context: > http://r.789695.n4.nabble.com/creating-a-package-in-R-tp4596411p4596411.html > Sent from the R devel mailing list archive at Nabble.com. > > __ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] creating a package in R
http://lmgtfy.com/?q=writing+an+R+package There you go. On Sun, Apr 29, 2012 at 4:28 PM, R. Michael Weylandt < michael.weyla...@gmail.com> wrote: > http://cran.r-project.org/doc/manuals/R-exts.pdf > > Ships with every distribution of R > > Michael > > On Apr 29, 2012, at 10:08 AM, nossa wrote: > > > Please give me the necessary links that permits me to create my own > package > > inR > > > > -- > > View this message in context: > http://r.789695.n4.nabble.com/creating-a-package-in-R-tp4596411p4596411.html > > Sent from the R devel mailing list archive at Nabble.com. > > > > __ > > R-devel@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-devel > > __ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > -- Joris Meys Statistical consultant Ghent University Faculty of Bioscience Engineering Department of Mathematical Modelling, Statistics and Bio-Informatics tel : +32 9 264 59 87 joris.m...@ugent.be --- Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php [[alternative HTML version deleted]] __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] creating a package in R
If you want simple step by step instructions for Windows, try this http://stevemosher.wordpress.com/ten-steps-to-building-an-r-package-under-windows/ On Sun, Apr 29, 2012 at 7:08 AM, nossa wrote: > Please give me the necessary links that permits me to create my own > package > inR > > -- > View this message in context: > http://r.789695.n4.nabble.com/creating-a-package-in-R-tp4596411p4596411.html > Sent from the R devel mailing list archive at Nabble.com. > > __ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > [[alternative HTML version deleted]] __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
