search for: representations

setClass("B", representation=representation("B", extra="numeric)) setClass("B", representation=representation(extra="numeric"), contains="B") Are these the same? If not, how do they differ? What about setClass("B", representation=representation("B", extra="numeric"), contains="B") ? As far as I can

Hi How do I specify an S4 class with a slot that is potentially numeric, but NA by default? I want the slot to be NA until I calculate its value (an expensive operation, not needed for all applications). When its value is known, I will create a new object with the correct value inserted in the slot. I want "NA" to signify "not known". My attempt fails because

Hello, I am trying to improve my skill on S4 classes. But there's something strange (to me) happening with "initialize" methods. This is probably a normal behaviour... but... something is unclear in my mind I declare two classes, namely "A", and "B", which has a slot of type A. The class "A" has an initialize method. What I do not understand is that

On Wed, Apr 27, 2011 at 12:51 AM, John McCall <rjmccall at apple.com> wrote: > On Apr 26, 2011, at 2:07 AM, Joe Armstrong wrote: >> Compiles (via clang) to: >> >>  ; ModuleID = 'test101.c' >>  target datalayout = >>

Hi! Consider this code. setClass("Ctest" ,representation( test="character" ,bla="character" ,mod="lm" ) ) new("Ctest",test="bla") #This produces an error. #Error in validObject(.Object) : Invalid "Ctest" object: Invalid object for slot "mod" in class "Ctest": got class

...t 09:28:54PM -0500, Shankar Easwaran wrote: > > The atom model allowed lld to have a single intermediate > > representation for all the formats ELF/COFF/Mach-O. The native model > > allowed the intermediate representation to be serialized to disk > > too. If the intermediate representations data structures are made > > available to scripting languages most of all linker script script > > layout can be implemented by the end user. A new language also can > > be developed as most of the users need it and it can work on this > > intermediate representation. > &...

Dear List, consider the following scenario: setClass(Class = "A", representation = representation(B = "B", C = "C")) setClass(Class = "B", representation = representation(C = "C")) setClass(Class = "C", representation = representation(something = "character")) Obviously, the collation for sourcing these defs needs to be: C,

Am Mo., 27. Jan. 2020 um 22:06 Uhr schrieb Uday Kumar Reddy Bondhugula < uday at polymagelabs.com>: > Hi Michael, > > Although the approach to use a higher order in-memory abstraction like the > loop tree will make it easier than what you have today, if you used MLIR > for this representation, you already get a round trippable textual format > that is *very close* to your

> > Okay, it's just not immediately undefined behaviour. The C model has more > issues because of the problem with how "trap representation" is defined > (which precludes trap representations for unsigned char, two's complement > signed char, etc.). This interpretation is further stressed because C only explicitly ascribes > undefined behaviour to trap representations on loads and stores. In this case, freeze(poison) can be used to represent an uninitialized value, because...

Hi all DSGraph users... This is a note to let you know that I just checked in a rather large change to the data structure graph representation. Here are the bonuses of the new representation: 1. Only the DSNode interface changed, mostly in implementation details, so hopefully client code shouldn't be effected. As a metric, nothing had to change in BottomUp or TopDownClosure.cpp for

...s problem is to teach the compiler about the semantics of the used parallel representation. While this sounds tedious at first, it turns out that we can perform key optimizations with reasonable implementation effort (and thereby also reasonable maintenance costs). However, we have various parallel representations that are already in use (KMPC, GOMP, CILK runtime, ...) or proposed (Tapir, IntelPIR, ...). Our proposal seeks to introduce parallelism specific optimizations for multiple representations while minimizing the implementation overhead. This is done through an abstract notion of a parallel region wh...

Hi everybody! I'm creating an object of a S4 class that has two slots: ListExamples, which is a list, and idx, which is an integer (as the code below). Then, I read a data.frame file with 10000 (ten thousands) of lines and 10 columns, do some pre-processing and, basically, I store each line as an element of a list in the slot ListExamples of the S4 object. However, many operations after this

leledumbo, from what you say, I assume you have some kind of representation (AST or a lower-level intermediate representation) from which you generate LLVM assembly. Is this representation in SSA form? If it is, you might want to do a "copy propagation" transformation that replaces the uses of all variables that are assigned a constant value by their definitions. Example: x = 5 y =

Hi, I am trying to create a linked list in R by defining a class Node which has a instance variable Node. setClass("Node", representation(rate="numeric", nextNode="ANY")) The above works. But the following gives me a warning message. setClass("Node", representation(rate="numeric", nextNode="Node")) > >

I'm trying to create a package for working on orientation data, i.e. data where the observations are 3D rotations. There are several different representations of orientations in common use: SO(3) matrices, Euler angles, unit quaternions, etc. One thing I'd like is to make it convenient to work in any representation, and have conversions to others done as needed. I'm trying to do all of this in S4 classes. Here's the current class structur...

I am interested in studying the binary representation of numerics (doubles) in R, so am looking for possibilities of output of the internal binary representations. sprintf() with format "a" or "A" is halfway there: sprintf("%A",pi) # [1] "0X1.921FB54442D18P+1" but it is in hex. The following illustrate the sort of thing I want: 1.1001 0010 0001 1111 1011 0101 0100 0100 0100 0010 1101 0001 1000 times 2 11.0010 0...

Hi the list. I try to learn the S4 programming. I find the wiki and several doc. But I still have few questions... 1. To define 'representation', we can use two syntax : - representation=list(temps = 'numeric',traj = 'matrix') - representation(temps = 'numeric',traj = 'matrix') Is there any difference ? 2. 'validityMethod' check the

Hi, Short story ----------- setClassUnion("ArrayLike", "array") showClass("ArrayLike") # no slot setClass("MyArrayLikeConcreteSubclass", contains="ArrayLike", representation(stuff="ANY") ) showClass("MyArrayLikeConcreteSubclass") # 2 slots!! That doesn't seem right. Long story ----------

...999" "2018-08-31 14:15:16.16.700000" [9] "2018-08-31 14:15:16.16.799999" "2018-08-31 14:15:16.16.900000" "2018-08-31 14:15:17.17.000000" However, if I use as.character, the milliseconds seemingly just get cut-off after one digit, resulting in incorrect representations: > as.character(test_seq) [1] "2018-08-31 14:15:16.0" "2018-08-31 14:15:16.0" "2018-08-31 14:15:16.2" "2018-08-31 14:15:16.2" "2018-08-31 14:15:16.4" "2018-08-31 14:15:16.5" [7] "2018-08-31 14:15:16.5" "2018-08-31 14:15...

Hi all, I am having a problem trying to declare a slot representation to hold a file connection. With V2.8.0 I had been using: setClass("Element", representation( [other slots removed], datafileConn = setOldClass(c("file","connection")) ) ) This resulted in a warning but still ran okay. No however with V2.9.0 I am getting