similar to: R.oo question

Hi! I'm trying to learn about object oriented R, as it seems like it would be very useful. I'm going over an example from the documentation, and I'm very confused: http://www1.maths.lth.se/help/R/R.oo/ [assume you've called library (R.oo)] setConstructorS3("SavingsAccount", function(balance=0) { if (!is.numeric(balance) && length(balance) != 1)

If someone is able, can you tell me if there is a better way to do this? More specifically, do I have to rewrite all of the data members stuff and extend stuff of parent class in the child class? See below. Thanks in advance! Example 1: setConstructorS3("ClassA", function(A,x) { if(missing(A))A=15; if(missing(x))x=NA; extend(Object(), "ClassA", .size = A, .x=x

Hi to all members, i have a question about class inheritance and methods using R.oo package: I have the following code and it doesn't work, guess i'm doing smth wrong and there is nothing in the help. library(R.oo) setConstructorS3("ClassA", function(A=15) { extend(Object(), "ClassA", .size = A ); }) setMethodS3("print", "ClassA",

Hello, Using the R.oo package, how do I throw an error if a field is not present when the user of the class creates the object? Using the example in the R.oo package: setConstructorS3("Person", function(name, age) { if (missing(name)) name <- NA; if (missing(age)) age <- NA; extend(Object(), "Person", .name=name, .age=age ) }) [rest of class methods

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",

Hello, I'm trying to get percentiles (PERCENTRANK for excel users) by factor in the following data.frame: myExample <- data.frame(Ret=seq(-2, 2.5, by=0.5),PE=seq(10,19),Sectors=rep(c("Financial","Industrial"),5)) myExample <- na.omit(myExample) Thanks to Patrick I I managed to put together the following lines which does it for the "Ret" column: myecdf

Hi all, I'm trying to do some object-oriented programming in R using the R.oo package. Right from the start I encountered a strange (at least for me) problem. I define a new class/constructor based on the R.oo documentation. However the first attempt to create an object fails: === Code: === library(R.oo); setConstructorS3("MyClass",function(param) { print(param);

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.

Apologies if I am not understanding something about how things are being handled when using S4 methods, but I have been unable to find an answer to my problem for some time now. Briefly, I am associating the generic '[' with a class which I wrote (here: myExample). The underlying back-end allows me to read contiguous slabs, e.g., 1:10, but not c(1, 10). I want to shield the user from this

Hi Henrik, I'm sorry to be bothering you, but there is something that I have been stuck with for a while now. I am trying to create a class like : setConstructorS3("MyPTCM",function(tokenslist=0) { extend(Object(), "MyPTCM", .gamma = 0.0, .rho = 0.0, .phi = 0.0, .tokenslist = tokenslist, .uniquetokens = unique(tokenslist),

Dear R.oo package users, while testing some functionality of the R.oo, I found that during the first construction of a object from a class, the constructor is twice called, but only one object is finalized. In all subsequent creation processes, the constructor is (expectedly) called once. Here some example code: library(R.oo) setConstructorS3("Test_class",function(val) {

Hello, How do I inherit two classes using the R.oo package. Below is kind of a silly example, but I am trying to create class PerDog from classes Dog and Person. Error at bottom. I've tried a few other ways of using extend(), but nothing seems to get me what I want. Example: setConstructorS3("Person", function(age=NA) { this = extend(Object(), "Person", .age=age )

OK. What did I booger up this time ? agent.myexample.org and puppetmaster.myexample.org are the same server. ---------------------------------------------------------------------------- # puppetd --no-daemonize --onetime --debug --noop debug: Puppet::Type::User::ProviderUser_role_add: file roleadd does not exist debug: Puppet::Type::User::ProviderDirectoryservice: file /usr/bin/dscl does not

Hello (Heinrich), I did not know I could do this. It doesn't seem to be documented anywhere. Thought this would be helpful to the fraction of the community using package R.oo. Note the call of a setMethodS3 method, xOne, in the setConstructorS3. This is extremely useful if xOne (in this case) is a very complex method (that you always want to be called every time you create a new object). If I

Hi all, I am attempting to learn SQL through sqldf... One task I am particularly interested in is merging separate (presumably large) files into a single table without loading these files into R as an intermediate step (by loading them into SQLite and merging them there). Taking a step back, I've considered these alternatives: 1) I know if I use straight SQLite commands I might use the

I thought I would post an example of using R.oo with inheritance and pass by reference for future searches. With PerMore I am inheriting Person. Then I am changing an object data memeber of an object of PerMore class using pass by reference ('mimiced' by R.oo) in an object of AgeMultiplier. I change a data member in the child class and the parent class for demonstration purposes. This is

Can someone show me how to modify one (R.oo) class's object inside another (R.oo) class's method? Is that possible with the R.oo package? A quick example or reference to an example would be outstanding... Thanks, Ben [[alternative HTML version deleted]]

I built R 2.2.0 from source on my debian machine yesterday and updated all packages. My problem is that "dates" function from its, that my code heavely uses is now masked by "dates" from chron. How can I specify tehat I want to use dates from its or how can I prevent it from being masked? > library(its) Loading required package: Hmisc Hmisc library by Frank E Harrell Jr

Hi R-community, I'm very busy with a software project which I would like to development completely with R.oo. Many of the object oriented aspects that I already know from Java development seems to be in place with this library. But...there is something that I'm really missing... *the super method call* Just a little example that shall demonstrate what I mean: Image we have the following

I use POSIXct for datetimes. Is thee a timeAlign function that I can use where : align by year direction -1 ==> start of this year direction 1 ==> start of next year align by week direction -1 ==> date on last sunday direction 1 ==> date on next sunday align by day direction -1 ==> time at past midnight direction 1 ==> time at this comming