similar to: R/S-Plus compatibility package

Displaying 20 results from an estimated 8000 matches similar to: "R/S-Plus compatibility package"

2001 Mar 30
0
Re: [Omega-bugs] RSMethods pkg causes data.frame misbehavior in R
Right. The methods such as as.data.frame.numeric don't get dispatched, basically because RSMethods tries to interpret class(x) in the S4 sense (so, e.g. a numeric vector has class "numeric"). Problems can then come from different semantics for S3-style and S4-style methods. The older methods don't dispatch on the mode of vectors (or equivalently, on the value of
2000 Jan 05
0
Statistical Software Prize
Dear colleagues: This summer, the ASA will award a new prize for statistical software. This note is to encourage you to apply or nudge someone you know to apply. The award is for software that contributes to better use of computing in statistical research and applications, written while the applicant was a student. There is a $1,000 prize plus the opportunity to give an invited talk at the
2001 Nov 02
0
Changes to the methods package
I'm about to commit some changes to the methods package. Before downloading the revised code, note the following. Because the changes involve a revised version of storage for the methods definitions, you will need to re-install any packages that contain method definitions, from their source code. Otherwise the methods will look as if they've disappeared from the generic functions. The
2001 Nov 13
0
Method dispatch in C for primitive functions
There is a version of the methods package committed today that does dispatch in C for these functions. This should considerably speed up programs that define methods for these functions (specifically, having methods should only marginally affect the existing computations for the same function on basic vectors and objects). This is the first of several steps needed. Not quite all primitives are
2001 Nov 13
1
Methods package: One of those strategy questions
I had better mention this one separately, since until it's settled you need a workaround. If you define methods for primitives now, this does NOT create an explicit generic function for, say, "[", so that the original primitive computations still run. This means that the method dispatch has to be turned on for that function somehow else. The proposal is that the library() and
2001 Nov 30
0
New version of methods package
A new version of the package has been committed to the r-devel branch. There are a lot of changes, mostly non-visible, many of those to tighten up some possible problems. For example, slot assignment now checks the validity of the value being assigned, and basic classes cannot be overriden. There is a version of the promptClass function by Vince Carey, to produce shell of documentation for a
2001 Dec 12
0
Changes to methods package in R 1.4
A few recent changes: - as announced to R-core, the package now has a version of the plot function with formal arguments (x, y, ...) that allow methods to be defined for x and/or y. ?setMethod has some examples. - The "basic classes" have been made somewhat more complete (class "structure" was added, along with relations among it, "matrix", "array",
2002 Apr 29
0
methods package: inheriting from structures; group generics
Now that 1.5 is released, some changes have been committed to the r-devel version of the methods package. They are mostly bug fixes (or making things work more as users would expect) in two areas: 1. new classes that extend one of the basic datatypes that have attributes but had no class attribute in S3 (e.g., "matrix" or "ts"). The previous code didn't handle the
2002 Aug 28
0
Fixes/additions to methods package
Some changes committed today to the r-devel (1.6.0) version of the methods package: 1. The function setOldClass has been added as per the green book, p. 450. The point in this case is not conversion as in the green book so much as allowing old-style classes to be included in signatures given to setMethod. This worked before (with a warning), but old-style inheritance couldn't be picked up.
2003 Jan 21
0
UseMethod; all.equal; isas-tests
1. UseMethod (via usemethod in objects.c) now uses the definition of class() to dispatch, with the methods package attached (dataClass(x)) and without (attr(x, "class")). Packages using a construction of the form if(is.null(class(x))) class(x) <- data.class(x) UseMethod("foo") should now get similar dispatch with the methods package attached. 2. all.equal and some of its
2003 Mar 17
0
Changes in checking & error messages
Some fixes have been made to check a few errors better & to report something like the correct error message in other cases. - setMethod will now refuse to set a method for a primitive function for a basic class ("[<-" for "matrix", for example). Previously the method was set but never dispatched. (For a few days, the change prohibited some valid methods for operators,
2003 Jul 24
0
Revisions of the S4 classes software + ?Documentation
Some changes to the implementation of S4 classes in the methods package will be committed to the r-devel version, probably later today. They should be largely back-compatible (exception noted below) but they are fairly extensive, so this is an advance notice. The changes form the first of a two-stage change aimed at making the implementation more consistent with R semantics, in particular with
2003 Aug 20
0
Changes to methods package
A number of changes were committed today. Mainly: 1. It should now be possible to install packages using classes and methods in a more straightforward way, and with or without saved images (saved images are still recommended for efficiency). The idea is to be able to write class & method definitions in a package source, with default `where' argument, as per examples in the green book.
2003 Sep 08
0
setAs() and namespaces
An example sent by Ross Ihaka points out a non-obvious step needed to export the results of setAs(). The as() mechanism can't use ordinary method dispatch because the second argument is the name of a class, not an object from the class. So it uses a "helper" function, coerce(), and sets methods for that function. Therefore, if you want to export the results of setAs(), at the
2002 Sep 10
0
Old-style classes: bug fix & request
Bug fix: A bug introduced in version 1.6 failed to "initialize" some old-style (aka "S3") classes, producing possible warning messages if those classes were used in the signature of a method in the methods package. The real bug, though, was that old-style inheritance could not be included, until the setOldClass function was provided. Initializing the methods package now
2003 May 22
0
Re: as(df, "list") does not propagate names
(I enlarged this mail from r-core to r-devel since it's an interesting question for general discussion.) Douglas Bates wrote: > > In a recent r-patched I notice that when df is a data.frame > as(df, "list") does not propagate the names whereas as.list(df) does. > Is this intentional? Well, it's explicit anyway. The as() function uses method dispatch for coerce()
2004 Aug 24
1
Changes to correct problems with classes in namespaces
An extensive set of changes to the methods package has been committed today to allow non-exported classes from packages with namespaces (and some related fixes in dealing with generic functions from namespaces as well). The namespace mechanism requires packages to export any class definitions that are part of the API. Unfortunately, NOT exporting classes has never really worked. The problem was
2002 Jun 04
0
build fails dumping R code in 'methods' on i686-pc-linux-gnu (PR#1632)
aa056@chebucto.ca wrote: > > Using the same settings in config.site as were used for R-1.4.1, > R-1.5.0 fails to build. > > ./configure --enable-R-shlib > > Using defaults and using PPro optimizations, the build failed in > package methods: > > dumping R code in package 'methods' > gmake[4]: *** [../../../library/methods/R/all.rda] Error 139 >
2001 Aug 27
1
is.environment, as.environment, and NULL
The r-devel (1.4) code has C implementations now of the class and class<- functions in package methods, and also of as.environment. The last brings up a question (it shows up in the isas-tests test suite). as.environment(NULL) is NULL. Seems like it has to be, since NULL is the environment associated with package:base. But is.environment(NULL) is FALSE, which is also fairly natural, if we
2002 Jul 02
0
Changes to the methods package
A new version was checked in to r-devel today. These are the main changes: 1. Objects from the methods package are no longer copied into base. As a result, the behavior of data.class and all.equal should be the same whether methods are attached or not. (The methods package no longer uses data.class.) Also, detaching the methods package should restore the behavior of class() to the S3