similar to: S3 method despatch (changed between 2.6.2 and 2.7.0 RC?)

Following my previous post on S3 method despatch, I put debug messages in the code of Axis, Axis.default and plot.default in graphics/R/axis.R and graphics/R/plot.R to print the class of x, at and y on plot. After recompiling R, what I see is that x *lost* its class attribute (at least for classes not known to 'graphics') in Axis, called directly from plot.default and this could be the

Hi, I am trying to define the as.POSIXct as an S4 method for one of my classes. Trying to define a generic, I am getting an error that it is already differently defined in base. However, if I query for it, there is no definition. Being in base, I also cannot really import it. If I define methods without definig a generic, they will work but with a warning that a new generic will be automatically

Dear list: working with date/times I have come across a problem that ISOdate and ISOdatetime are too slow on large vectors of data. I was surprised just until I looked at the implementation and the man page: "ISOdatetime and ISOdate are convenience wrappers for strptime". In other terms, they convert data to character representation first in order to create a POSIXlt object that is then

Dear list: I am looking for a good way to create an S4 class that would extend numeric, but would allow NULL instead of data as well. As far as I can see there is no way at the moment to do that, but please correct me if I am wrong. The best solution I came up with so far was the following (it also indicates a problem of using setClassUnion with numeric as one of the classes): I define a class

Dear list: is there any good reason why 'c', 'cbind', 'rbind' etc (all defined as 'function(..., <rest>)') are generic and thus methods can be defined whereas such quite useful functions like 'cat' and 'write' are not? Would it not be reasonable to add such functionality? This would allow to define S3/S4 methods for cat and write for complex

Hi. I'm using R1.3.1 on a x86 machine running Win 2000. My problem: - I want to convert a string to a date format using strptime. As I'm from Portugal my locale information is the following: > Sys.getlocale() [1] "LC_COLLATE=Portuguese_Portugal.1252;LC_CTYPE=Portuguese_Portugal.1252;LC_MO NETARY=C;LC_NUMERIC=C;LC_TIME=Portuguese_Portugal.1252" If I do the following

Looks like there is a buglet in 'installed.packages', around line 17: for (lib in lib.loc) { dest <- file.path(tempdir(), paste("libloc_", URLencode(lib,=20 TRUE), paste(fields, collapse =3D ","), ".rds", sep =3D "")) if (!noCache && file.exists(dest) && file.info(dest)$mtime >=20

Hi. I've already posted this question 2 months ago but as I've got no answer I've decided to try again :-) I'm using R1.3.1 on a x86 machine running Win 2000. My problem: I want to convert a string to a date format using strptime. As I'm from Portugal my locale information is the following: > Sys.getlocale() [1]

Dear list. Has anybody had any issues with ROracle, namely consistently leading to a segmentation fault? One of our oracle databases seems to have certain issues at the moment (do not know what exactly though) and if that one is queried ROracle definitely fails with a segmentation fault. Any ideas? Here is the trace and below is also a type of query that crashes it: *** caught segfault ***

Dear list: I would like to override the default way R formats plot axes with a custom method(s). Obviously I would prefer to define it as general as possible avoiding writing a custom method for each individual class where possible. The plot.default method (and I assume other methods as well) calls Axis(...) to produce the axis layout depending on data. In this sense it seems reasonable to

Dear list. It is a known issue that accessing slots of S4 objects and in particular accessing .Data slots is slow in R. However, what surprises me are two things demonstrated in the code below (runnable with 'inline', my times are in the comments): - copying data out of a large 3x1e7 .Data slot into a matrix can be easily made 3-4 times faster than accessing a .Data slot which I believe

A strange thing happened. After installing the most recent RC version of 2.7 (2008-04-20 r45403) I compiled it as usual with no errors. After installing it I ran "make fullcheck". I got as far as testing recommended packages and I got the following: ... -------- Testing package foreign -------- Running examples in 'foreign-Ex.R' ... Comparing `foreign-Ex.Rout' to

R version 2.7.0 RC (2008-04-20 r45403) When using semi-transparent filled plotting symbols, the border of the symbol has a different (darker) colour than the interior: plot(0, 0, pch=19, col="#FF000022") (Saving this as a PDF and looking at it magnified may make it easier to see.) This is pretty annoying, since when plotting partially overlapping points, the border colour dominates,

Hi all: following the previous discussion, it looks like plot(x) with y=NULL still does not work correctly. If one tries for example plot(1:5) it works, but already for plot(runif(100)) it does not. I posted the proposed correction for plot.POSIXct and plot.POSIXlt before. Please voice your opinions whether the following fix for plot.default could be reasonable? I include the full function and

Hello all... I'm trying to create a simple language that supports classes using the OCaml API. When I use the web page demo to produce the intermediate code for the following C++ example ... class MyClass { public: MyClass(); int c; }; MyClass::MyClass () { c=55; } ...I get something like this .... %class.MyClass = type { i32 } @MyClass::MyClass() = alias void (%class.MyClass*)*

Hello everyone, I'm working on a package using S4 classes and methods and I ran into the following "problem" when I tried to create an "apply" method for objects of one of my new classes. I've found a way around the problem but I wonder if I did not paint myself into the corner. I'd like your opinion about that. So I have an object "myObj" of class

Dears, I have a question about copying reference objects using the initialize method. 1) If the latter has no arguments, there is no problem to copy an object. myClass = setRefClass("myClass", fields = list(value = "numeric") ) myClass$methods(initialize = function(...){ ? value <<- 1 ? callSuper(...) }) newObject = myClass$new() newObject$value = 2 copyObject =

Dear All: We have been experiencing networking issues so I don't know if this got through; I can't see it in the archive. My sincere apologies if this appears twice. I may have found an unusual bug and am posting here to see if anyone can reproduce it on their system. First of all, sessionInfo(): > sessionInfo() R version 2.7.1 (2008-06-23) i386-apple-darwin8.10.1 locale:

Dear friends, there is a serious problem with RODBC on R from 2.6.2 to 2.8.0 on a postgresql 8.3 database. Let's say we define an empty dsn called "test", with user "postgres" and password "none". We test the connection with another application, and it works properly. When you call the database using RODBC, you get the following: >

Dear friends, there is a serious problem with RODBC on R from 2.6.2 to 2.8.0 on a postgresql 8.3 database. Let's say we define an empty dsn called "test", with user "postgres" and password "none". We test the connection with another application, and it works properly. When you call the database using RODBC, you get the following: >