similar to: Feature request: 'file.path()' accepting an input vector

Displaying 20 results from an estimated 20000 matches similar to: "Feature request: 'file.path()' accepting an input vector"

2011 Jun 06
1
How can I write methods for 'as()'?
Dear list, I wonder how to write methods for the function 'as' in the sense that I can call 'as(object, Class, strict=TRUE, ext)' and let method dispatch figure out the correct method. AFAIU, there is a difference between, e.g. 'as.data.frame' and the methods of 'as()' as stated above since the former depends on arg 'x' instead of 'object',
2011 Jun 14
1
Reset R's library to base packages only (remove all installed contributed packages)
Dear list, is there a way to comfortably "reset" R's library such that it only contains only the base packages again? In other words, how can I uninstall all contributed packages that I installed? Is there some sort of index that's keeping track of what has been installed? If so, a pointer would be great. AFAIU, if you don't create such an "index file"
2011 Jun 03
2
Bug or feature: using "ANY" as a generic field class (was: '[R] Is there a (virtual) class that all R objects inherit from?)
Dear list, I was wondering if you could help me out in clarifying something: Is it possible to use class "ANY" in slots/fields of formal classes if you a) do not want to restrict valid classes of that field and b) if you are making explicit use of class inheritance? It seems to work in simple scenarios but produces errors when class inheritance comes into play. So I was
2014 Nov 27
2
Feature request: mixing `...` (three dots) with other formal arguments in S4 methods
Hi Gabriel, and thanks for answering. I'm basically just trying to find a way to use the power of `...` in more complex scenarios and I'm well aware that this might not be the best approach ;-) Regarding your actual question: "Are you suggesting methods be dispatched based on the *contents* of ... [...]?" Yes, I guess currently I kind of do - but not on the argument *names*
2014 Nov 28
1
Feature request: mixing `...` (three dots) with other formal arguments in S4 methods
Well, the benefit lies in the ability to pass along arguments via `...` to more than one recipient that use *identical argument names* and/or when these recipients are not necessarily located on the same calling stack layer. I'm *not* after a *general* change in the way arguments are dispatched/functions are called as I'm actually a big friend of keepings things quite explicit (thus
2014 Nov 27
2
Feature request: mixing `...` (three dots) with other formal arguments in S4 methods
Dear List, I'm currently investigating if the argument dispatch mechanism based on `...` could somehow be "generalized" to scenarios that involve `r` recipients located across `c` calling stack layers *and* combined with the S4 method mechanism (for those interested see
2011 Mar 07
1
WG: Reference classes: error with missing arguments in method calls
Dear list, a while ago I posted this at r-devel but got no answers. Hope it?s okay to give it a shot again by cross-posting it here. TIA for any comments, Janko Von: Janko Thyson [mailto:janko.thyson.rstuff at googlemail.com] Gesendet: Montag, 21. Februar 2011 00:58 An: r-devel at r-project. org (r-devel at r-project.org) Betreff: Reference classes: error with missing arguments in method calls
2011 Feb 16
2
Avoiding name clashes: opinion on best practice naming conventions
Dear List, I'm trying to figure out some best practice way with respect to the naming conventions when building own packages. I'd like to minimize the risk of choosing function names that might interfere with those of other packages (both available ones and those yet to come). I came up with following alternatives 1. Prefixing the actual names (e.g. myPkgfoo() instead of foo()): pretty
2009 Aug 21
1
Function "nsl()" missing in package utils
Dear list, today I stumbled across the function ?nsl()? for the first time in order to perform a hostname lookup. According to the R Reference Index (Version 2.9.1, page 1522), the function should be part of the "utils" package. However, I cannot find it in the utils package of my installation(s). I've tried the R-versions 2.8.1, 2.9.0 and 2.9.1. I'd be very thankful if
2010 Aug 17
4
Problems building own package (Error: "package has been build before R-2.10.0")
Dear List, I’m doing my first baby steps towards developing own R Packages and ran into the following problem: R CMD check mypackage works fine (no errors, no warnings) R CMD build mypackage works fine (no errors, no warnings) R CMD INSTALL –library=”C:\R\R-2.11.1\library” “something\mypackage\mypackage_1.0.tar.gz” works fine (no errors, no warnings) However, when I try loading the
2010 Aug 17
4
Problems building own package (Error: "package has been build before R-2.10.0")
Dear List, I’m doing my first baby steps towards developing own R Packages and ran into the following problem: R CMD check mypackage works fine (no errors, no warnings) R CMD build mypackage works fine (no errors, no warnings) R CMD INSTALL –library=”C:\R\R-2.11.1\library” “something\mypackage\mypackage_1.0.tar.gz” works fine (no errors, no warnings) However, when I try loading the
2011 May 19
1
Feature request: extend functionality of 'unlist()' by args 'delim=c("/", "_", etc.)' and 'keep.special=TRUE/FALSE'
Dear list, I hope this is the right place to post a feature request. If there's exists a more formal channel (e.g. as for bug reports), I'd appreciate a pointer. I work a lot with named nested lists with arbitrary degrees of "nestedness". In order to retrieve the names and/or values of "bottom layer/bottom tier", I love the functionality of 'unlist()', or
2012 Jul 30
1
Possible bug in class 'POSIXlt' when including microseconds?
Dear list, I'm a bit puzzled by an ambiguity with respect to the representation of micro-/milliseconds when using 'POSIXlt' objects. It seems that the last digit of the 'sec' attribute sometimes seems to differ from the digits shown when printing the 'POSIXlt' object. You'll find a little SO post with some example code here:
2011 May 26
1
Is it possible to define a function's arguments via a wildcard in 'substitute()'?
Dear List, just out of pure curiosity: is it possible to define a function via 'substitute()' such that the function's formal arguments are specified by a "wildcard" that is substituted when the expression is evaluated? Simple example: x.args <- formals("data.frame") x.body <- expression( out <- myArg + 100, return(out) ) expr <-
2014 Dec 15
3
Significant memory leak when using XML on Windows
Thanks a lot for answering. Before I get into it, please note that everything below bears the big capture "Thanks for trying to help me at all". 1) Yeah, those examples - quite hard to satisfy everyone's needs ;-) While the one side complained that my past examples regarding this issue were not informative enough, others didn't like the more elaborated version (as seems to be
2013 Mar 20
1
S4 Reference Classes: undesired behavior when calling method '$field()'
Dear list, I came across a behavior that IMHO is somewhat undesired when calling '$field()': If the field name whose value you're trying to get is *not* a valid field of the Reference Class, then R doesn't stop there with an error, but scans through all enclosing environments/frames. The result is something similar to calling '|get(<objname>, inherits=TRUE)|'
2011 Aug 18
1
Bug: argument 'lib.loc' not passed on appropriately in 'library()'?
Dear list, I'm experimenting with setting up custom 'lib' and 'destdir' directories for my R packages. It seems to me that 'library()' does handle a custom 'lib.loc' argument the way it should for an arbitrary package but NOT for its dependencies on other packages. The latter are looked for in the default lib path (~/R/R-2.x.x/library) and NOT in the custom
2011 Jun 10
2
Require of gWidgetsRGtk2 fails: RGtk2.dll can't be found, but it's there
Dear list, I've been trying to get gWidgets/gWidgetsRGtk2 to run every other month for a while, but somehow I simply can't figure out what's going wrong. I tried several distributions of the GTK runtime environment for Windows (http://downloads.sourceforge.net/gladewin32/gtk-2.12.9-win32-1.exe as described in the package's vignette,
2011 Mar 20
2
Feature request: rating/review system for R packages
Dear List, I'm aware that this has been brought up before (e.g. <http://tolstoy.newcastle.edu.au/R/e6/help/09/03/7365.html> http://tolstoy.newcastle.edu.au/R/e6/help/09/03/7365.html ; <https://stat.ethz.ch/pipermail/r-help/2009-March/190902.html> https://stat.ethz.ch/pipermail/r-help/2009-March/190902.html), I couldn't find anything recent on the topic, though. After
2010 Nov 04
2
Roxygen: @example tag does not work for me
Dear list, somehow I can't get the Roxygen tag "@example" to work for me. My "Roxygen-Header" of a script containing, say, a function looks like this: #' My header #' #' My description #' #' @param a Blabla. #' @param b Blabla. #' @return \code{TRUE}. #' @callGraphPrimitives #' @references #'