similar to: editing import data, strings

Hello. I'm new on that forum, so I would use some help... I'm programing with R program, have some exercise to do. So here it goes. 1. I have to upload two libraryes "sp" and "maptools" 2. This command is troubling me : towns <- readShapeSpatial("OB/OB.shp") 3. When I'm pressing f5, there is an error called: Error: could not find function

Hello to all again :) Again, I have an issue with my homework. I was troubling myself for two days, and I still can't get it :( So, if someone can help me, I would be so grateful... HOMEWORK 1. I need to draw function, random walk take the length of walk, and its in 2D. As a result, I have to take matrix in which are i-lines of matrix, written coordinates on i-steps radnom.walk <-

Hi all, I did my first bug report in a while. Unfortunately the good folks at wineHQ.org didn't like it much because Gentoo by default stripped out much of the backtrace info. I've recompiled Wine with more backtrace capabilities in it and am wondering what's considered good enough. Below are two backtraces. They may or may not be exactly the same failure but they both come from

I need some guidance on what is the best way to automate R I am aware of Rterm. First question: Is it true that R is not currently OLE accessible under Windows 2000? Second question: Is there an R command that echoes all R Console results to a run log system file? My first attempt to write a run log file is the example from the R Data Inport/Export documentation. > zz<-

Dear all, Assume that I have an S4 class "MyClass" with a slot "myname", which is initialized to: myname="" in method("initialize"): myclass <- new("MyClass", myname="") Assume that class "MyClass" has a method "mymethod": "mymethod.MyClass" <- function(object, myname=character(0), ...) {

Dear All, In R 3.6.3 (and earlier), method dispatch used to work for methods stored in local environments that are attached to the search path. For example: myfun <- function(y) { out <- list(y=y) class(out) <- "myclass" return(out) } print.myclass <- function(x, ...) print(formatC(x$y, format="f", digits=5)) myfun(1:4) # prints: [1]

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

Hi all ! I noticed a strange behaviour of the function `class<-` when a class-specific '[[.' method is defined. Here below a reproducible example : #-------------------------------------------------------------------. counttt <- 0 `[[.MYCLASS` = function(x, ...) { counttt <<- counttt + 1 # browser() x = NextMethod() return(x) } df <- as.data.frame(matrix(1:20,

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 =

I am writing a function to work with class I am defining. I have a question about using nargs() inside of parentheses function. nargs() shows the same for supplying 1 argument, or no arguments at all. Here is a small example: > "[.myclass"<-function(x,...) print(nargs()-1) > x<-c(1,2,3) > class(x)<-"myclass" > x[] [1] 1 > x[1] [1] 1 > x[1,2] [1] 2

Dear all, Currently, a ts object behaves like an array, and it would be very useful to have a similar object, which would behave like a data.frame, i.e. it could be indexed, named, etc. like a data.frame. What would be the most efficient way to construct such an object? I have tried to make one on my own following the directions of class design from "S Programming" (2000) as a

Dear all, Since my package is based on S4 classes, I would like to know how to add a slot to an existing S4 class without breaking the code of users of my package. Assume the following S4 class: setClass("MyClass", representation(name = "character", type = "character", data = "data.frame" ), prototype(name =

How can I define a static member of a class? not a static method, rather a static field that would be accessed by all instances of the class.

Hello, I'd like to 'do work' on data members upon construction (i.e. without implementing it in a get method). Is this the best way to create data member 'z' upon construction? I'm thinking if .z=paste(x,y) below gets more complex I'll run into issues. setConstructorS3("MyClass", function(x=NA,y=NA,...) { this <- extend(Object(), "MyClass",

Hi, I''m pretty new to all related to bdd and rspec and I have the following question. Is it possible to stub actions that return different objects depending on the parameteres they were called with? Something like this: MyClass.stub!(:method).with(1).and_return(@mock_object_1) MyClass.stub!(:method).with(2).and_return(@mock_object_2) I know I could use

Hey all, I working on a project, but I am not sure I can do what I want to do. The following works beautifully: Event.observe(el, ''click'', function () { this.className += " myClass"; return false; }); I have also tried doing this: this.varname = ''test''; Event.observe(el, ''click'', function () { alert (this.varname); }.bind

Dear all, I have created a new S4 class with name "MyClass". Please see below for it's definition. Now I want to create a method for the show() function for this class. In defining this method, what I want is, once user would like see an object of this class some values will be displayed. Then R will ask for **press Enter**. Once user presses enter then, remaining values will be

I am using the clang API (version 3.1 - trunk 153913) to compile some very simple code as follows class MyClass { ~MyClass() ; }; MyClass::~MyClass() { } int main() { return 0; } My problem is that I get the error message: test.cpp:20:10: error: destructor cannot have a return type MyClass::~MyClass() If someone can point me to the right direction that would be great. It compiles fine if

Hi R-Help, Please consider the following simple case: I have a class like setClass("myClass", representation(x="matrix", y="character")) and I would like to use the method *"["* for a *myClass* objects (but changing the default *drop* argument from TRUE to FALSE): setMethod("[","myClass", function(x,i,j,...,drop=FALSE)

Sorry in advance if this is too simple a question, but I'm stuck with some odd behavior and I can't find the text to rid myself of this (admittedly somewhat trivial) problem. Note that I've done generic programming with S3 "objects" in the past, but I've never really dabbled in creating S4 objects until now. So, I've created a new S4 class, call it