Re: [Rd] Contract Syntactic Sugar

Ivo, If you don't like the multipart function syntax you can write a single definition. Personally I prefer this as it isolates data management logic and control flow from model/application logic. There are duck typing operators that you can use in the guard similar to the syntax you wrote. You

Re: [Rd] [R] gettext weirdness

On 05/02/13 00:02, Prof Brian Ripley wrote: > On 04/02/2013 11:14, Florent Angly wrote: >> Hi Brian, >> >> I appreciate your clarifications. I am sending this reply to the >> R-devel, as per you suggestion. >> >> As mentioned in my post, I have no prior experience with this R function >> and logica

Re: [Rd] Contract Syntactic Sugar

hi brian---interesting and very impressive. is it possible to move everything into one definition and/or to chain multiple conditions? exponentiate(x, exponent) %::% data.frame : c(numeric,allpositive) : integer %as% { x %has% base ## my invention, since this is not checked, and R is not stri

Re: [Rd] Contract Syntactic Sugar

Ivo, You might be interested in my lambda.r package which provides syntax (using the %::% operator) for type constraints. Given a function with n arguments, the type constraint requires n + 1 types, as the last type listed is the return type. Lambda.r also provides syntax for specifying any ar

Re: [Rd] Contract Syntactic Sugar

Ivo, Have you looked at the TypeInfoBioConductor package by Gentleman and Temple Lang? I don't use it myself and can't speak to its current state, but from its description, and having talked to one of its authors (who, for full di

[Rd] Contract Syntactic Sugar

## the following is a dream: add some sugar syntax to allow for contracts with teeth (in and out checking) > is.positive <- function(x) (all(x>0)) > exponentiate <- function( x ::is.data.frame , exponent ::is.numeric > is.positive) :: is.vector is.numeric { x$base :: is.positive##

Re: [Rd] Error building R from SVN - unable to run 'pdflatex' on 'example-1.tex'

On 5 February 2013 at 01:27, Jonathon Love wrote: | On 04/02/13 23:47, Duncan Murdoch wrote: | > Probably, but if you want help you're going to need to give some more | > information first, such as what exactly you installed from SVN, what OS | > you are using, what target you tried to build, a

Re: [Rd] R-lang edit: deparse(1:2) is no longer a good example of the R parser's non-invertibility

On 04/02/2013 12:20 PM, Josh O'Brien wrote: Hello, Apparently thanks to improvements to the R parser, this example from section 6.1 of the R Language Definition no longer holds. > deparse(quote(c(1, 2))) [1] "c(1, 2)" > deparse(1:2) [1] "c(1, 2)" Thanks, I'll replace that example with this

[Rd] R-lang edit: deparse(1:2) is no longer a good example of the R parser's non-invertibility

Hello, Apparently thanks to improvements to the R parser, this example from section 6.1 of the R Language Definition no longer holds. > deparse(quote(c(1, 2))) [1] "c(1, 2)" > deparse(1:2) [1] "c(1, 2)" Even running R-2.14.2, I get instead > deparse(1:2) [1] "1:2" _

Re: [Rd] Error building R from SVN - unable to run 'pdflatex' on 'example-1.tex'

Well, if all else fails read the manual: The PDF documentation (including doc/NEWS.pdf) and building vignettes needs tex and latex, or pdftex and pdflatex. We require LaTeX version 2005/12/01 or later (for UTF-8 support). Building PDF package manuals (including the R reference manual) and vign

Re: [Rd] Error building R from SVN - unable to run 'pdflatex' on 'example-1.tex'

On 04/02/13 23:47, Duncan Murdoch wrote: > Probably, but if you want help you're going to need to give some more > information first, such as what exactly you installed from SVN, what OS > you are using, what target you tried to build, and anything else > necessary so that a potential helper can d

Re: [Rd] [R] gettext weirdness

On 04/02/2013 11:14, Florent Angly wrote: Hi Brian, I appreciate your clarifications. I am sending this reply to the R-devel, as per you suggestion. As mentioned in my post, I have no prior experience with this R function and logically, I looked up its help page, which states: Conventionally t

Re: [Rd] Error building R from SVN - unable to run 'pdflatex' on 'example-1.tex'

On 13-02-03 9:52 PM, Jonathon Love wrote: G'day, I'm trying to build R using the code from SVN. I am able to successfully build the source from here: http://cran.r-project.org/src/base/R-2/R-2.15.2.tar.gz However, when building the code checked out from SVN (either from 2.15.2 tag, or the trun

Re: [Rd] [R] gettext weirdness

Hi Brian, I appreciate your clarifications. I am sending this reply to the R-devel, as per you suggestion. As mentioned in my post, I have no prior experience with this R function and logically, I looked up its help page, which states: > Conventionally the domain for *R* warning/error messages

[Rd] Error building R from SVN - unable to run 'pdflatex' on 'example-1.tex'

G'day, I'm trying to build R using the code from SVN. I am able to successfully build the source from here: http://cran.r-project.org/src/base/R-2/R-2.15.2.tar.gz However, when building the code checked out from SVN (either from 2.15.2 tag, or the trunk) I get the following error: Error: