similar to: Lost in S4 and S3 classes

Hello everybody: I get a strange behavior with seq, take a look at this: > msd <- seq(0.05,0.3, 0.01) > msd[13] [1] 0.17 > class(msd) [1] "numeric" > class(msd[13]) [1] "numeric" > typeof(msd[13]) [1] "double" now the problem: > msd[13] == 0.17 [1] FALSE It is strange only to me? Consider that: > 0.17 == 0.17 [1] TRUE and also > a

Hi Ferad, On Wed, 2007-04-04 at 19:48 +0200, Ferad Zyulkyarov wrote: > Hi, > > I want to ask for a small help for creating an instruction that calls > e member method of an object. I suppose that this is not a headache > but I am impatient in learning :) I would be very thankful if you can > show me an example snippet code that does this in LLVM. Below is > described my

I don't understand the following behavior for a simple S3 class. The auto-printing at the command line doesn't behave as I expect. I'm probably missing something, but it might be a bug. > print.testClass <- function(x, ...) cat("Class:", class(x), ":", x, "\n") > structure(1, class = "testClass") Class: testClass : 1 > print(1 *

Hello, I am the maintainer of the stringkernels package and have come across a problem with using S3 objects in my S4 classes. Specifically, I have an S4 class with a slot that takes a text corpus as a list of character vectors. tm (version 0.5) saves corpora as lists with a class attribute of c("VCorpus", "Corpus", "list"). I don't actually need the

I edit two files named test.h,test.cpp as follow: ///////////////test.h////////////////////////////////////////////////////////////////class TestClass { private: int fTotal; public: TestClass(); ~TestClass(); };///////////test.cpp/////////////////////////////////////////////////////////////////////////////#include "test.h" TestClass::TestClass() { fTotal = 2; }

Hi, I'm trying to create a package that contains reference class definitions from which users can create reference objects, but there seems to be something awry. My toy example creates an empty package via package.skeleton('TestClass') to which I add the following R code: TestClass <- setRefClass('TestClass',fields=c('name')) Unfortunately my R console output

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

Is it possible to override the $new(...) in the reference class generator? I have tried adding a "new" method to the methods of the class, but that is obviously not correct. I have also tried adding it to the class generator, but the class generator still uses the default constructor. As a simple example, this is the current interface: TestClass <- setRefClass

Hi R friends,   I'm still studying S4 classes and I have a question about slot assignment. Why would I have to use a special setter method [example 2 below] if I can assign data to a slot directly when I call new() [example 1 below]?   ## first way to do it (the idiosyncratic way?) setClass(Class = "TestClass", representation = representation(myDf = "data.frame"))

Hi, I want to ask for a small help for creating an instruction that calls e member method of an object. I suppose that this is not a headache but I am impatient in learning :) I would be very thankful if you can show me an example snippet code that does this in LLVM. Below is described my case. Let's say I have a class TestClass class TestClass { int testMethod(int a); } and I want to

Ferad Zyulkyarov wrote: > Hi, > > I want to ask for a small help for creating an instruction that calls > e member method of an object. I suppose that this is not a headache > but I am impatient in learning :) I would be very thankful if you can > show me an example snippet code that does this in LLVM. Below is > described my case. > > Let's say I have a class

On 4 Apr 2007, at 20:10, Jeff Cohen wrote: > […] > %obj = alloca %struct.TestClass, align 1 ; <%struct.TestClass*> > [#uses=1] > %tmp1 = call int %_ZN9TestClass10testMethodEi( %struct.TestClass* % > obj, int 1 ) ; <int> [#uses=0] > ret void > } > > declare int %_ZN9TestClass10testMethodEi(%struct.TestClass*, int) The name mangling is not very pretty

When a reference class method is accessed with .self$x, it has different behavior from .self[['x']]. The former copies the function to the object's environment (with some attributes attached), and the latter just return NULL (unless it has already been accessed once with .self$x). Is this how it's supposed to work? Here's an example that illustrates:

Hi, the following Code demonstrates an possibly Error in R (or you can explain me, why this happens, thanks in advance) Code: ##################################### testClass <- function( stackData= c()) { list( write= function( ...) { sChain= "" for( s in c( stackData, ...)) { sChain= paste( sChain, '"', sub( '"',

Dear list, When playing around with the "[" method for S4 classes I noticed that it gets called twice in my example. setClass("testClass", representation(a="character")) setMethod("[", signature(x = "testClass", i = "ANY", j="ANY"), function (x, i, j, ..., drop){ print("void function")

Dear list, can someone explain to me why deparse(substitute(x)) does not seem to work when x is of a user-defined S3 class? In my actual problem, my print method is part of a package, and the method is registered in the NAMESPACE, if that should make a difference. > print.testclass <- function(x,...){ xname <- deparse(substitute(x)) cat("Your object name

Dear All, I came across an error message recently when constructing a reference class, an example is attached below, it looks like only if I call a specific method in advance, otherwise it cannot be found in defined method without using .self, this make it difficulty that sometimes in my initialize method, I need to call other method defined in the same reference class, the workaround for this is

Luc Bourhis wrote: > On 4 Apr 2007, at 20:10, Jeff Cohen wrote: > > >> […] >> %obj = alloca %struct.TestClass, align 1 ; <%struct.TestClass*> >> [#uses=1] >> %tmp1 = call int %_ZN9TestClass10testMethodEi( %struct.TestClass* % >> obj, int 1 ) ; <int> [#uses=0] >> ret void >> } >> >> declare int

Hi I am facing an issue with the package selectr, where I get an error trying to run an example code: css_to_xpath(".testclass"), gives could not find function "xpath_class" The issue arises however only with the package installed with apt-get, not when installed from within R. I got a similar issue with maptools, where I was not able to use data(wrld_map), and switching to

Dear R gurus, I am trying to create a nicer API interface for some R modules I have written. Here, I heavily rely on S3 method dispatch mechanics and makeActiveBinding() function I have discovered that I apparently can't dispatch on function call operator (). While .Primitive("(") exists, which leads me to believe that things like x(...) are internally translated to