search for: theorists

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

Dear All, I have two simple data samples (no groups or factors, etc.) and would just like to compute the two-sample Wilcoxon Rank Sum test using the wilcox_test function contained in the coin package, which is reportedly better than the regular wilcox.test function because it performs some adjustment for ties. Would anyone know how to craft a script to perform this task? Much appreciated. Janh

Hi suppose I have two arrays x1,x2 of dimensions a1,b1,c1 and a2,b2,c2 respectively. I want x = x1 "+" x2 with dimensions c(max(a1,a2), max(b1,b2),max (c1,c2)) with x[a,b,c] = x1[a1,b1,c1] + x2[a2,b2,c2] if a <=min(a1,a2) , b<=min (b1,b2), c<=min(c1,c2) and the other bits either x1 or x2 or zero according to whether the coordinates are "in range" for

hits=1.0 tests=MANY_EXCLAMATIONS X-USF-Spam-Flag: NO Hi I am writing a package for multivariate polynomials ('multipols') using S3 methods. The package includes a Ops.multipol() function for the arithmetic methods; I would like to define some sort of user-specified Boolean option which, if set, would force results to be simplified as they are produced. Call this option

Hi Suppose I have an S4 class "foo" and a validity checking function ".checkfoo()": setClass("foo", representation=representation("numeric")) setValidity("foo" , .checkfoo) is fine; in my application, .checkfoo() verifies that a bunch of necessary conditions are met. But .checkfoo() is very time consuming and I want to give users the option

On Thu, April 2, 2015 2:55 pm, Always Learning wrote: > > On Thu, 2015-04-02 at 13:08 -0500, Johnny Hughes wrote: > >> CentOS releases are NOT the same as EUS and have never been .. yet that >> seems to be what people expect. We want there to be no doubt on this >> issue. > > Is there a commercial motive for this 'unwelcome by most' change ? > > If

Okay, so I am trying to embrace the RESTful approach to web application design and wanted to get some feedback from others. I understand that it can be done different ways, I''m just interested to see what real RESTful theorists think. Lets say that you have an application that has lists and items on that list. I can see how both lists and items can be set up as resources. Now, lets say you want to have an action to both show you the current sorted list* and then allow you to save a new sort. You would need a custom GE...

Hi [this after some considerable thought as to R-help vs R-devel] I want to write a (S3) method for as.function(); toy example follows. Given a matrix "a", I need to evaluate trace(ax) as a function of (matrix) "x". Here's a trace function: tr <- function (a) { i <- seq_len(nrow(a)) return(sum(a[cbind(i, i)])) } How do I accomplish the following:

hello I maintain the gsl R package, and many users have recently reported that the package does not install from source under macosx 10.9 ("mavericks"). Users typically install the gnu GSL library and are able to compile and run a small "hello world" program which executes some of the Bessel functionality of the library; but under mavericks the configure script (which uses

...emerging multisite recording and noninvasive imaging techniques. The second involves the development of a calculus to study the dynamical behavior of nervous systems and the computations they perform. A distinguishing feature of the work group is a close collaboration between experimentalists and theorists with regard to the analysis of data and the planning of experiments. The work group will have a limited number of research lectures, supplemented by tutorials on relevant computational, experimental, and mathematical techniques. The topics covered in the workgroup will maintain continuity with pas...

I have port 143 open so that I can get my mail when away from home. Occasionally, though, my router reports things like Thu, 2008-03-27 02:00:11 - TCP Packet - Source:200.122.134.9,3821 Destination:88.97.17.41,143 - [IMAP rule match] Thu, 2008-03-27 05:39:49 - TCP Packet - Source:140.127.181.141,3461 Destination:88.97.17.41,143 - [IMAP rule match] Thu, 2008-03-27 16:10:03 - TCP Packet -

Hello I am writing a replacement method for an S4 class and want to pass an additional argument to "[<-"() along the lines of "["()'s "drop" argument. Specifically, I have an S4 class, call it "foo", with a slot 'x' that is a vector and a slot 'NC' that is a scalar. I want to be able to pass a Boolean argument to the

I''ve tried to have 2 methods of the same name (but with different parameter signatures) and it always seems like the later declaration tends to win out, does this mean that ruby does not support overloading? If so what aboutt the .new method? You can either call it as .new (with nothing) or .new(hash variable). Is it possible to override a specific instance of the zero parameter

I got the following error: a = read.csv("mat.csv") b = as.matrix(a) tb = t(b) bb = tb %*% b dim(bb) ibb = solve(bb) bb %*% ibb > ibb = solve(bb) Error in solve.default(bb) : system is computationally singular: reciprocal condition number = 1.77573e-19 > Are there any ways to find more information about why it is singular? Thanks.

Dear: I have a paired equation below. Can I solve (x,y) using R. Thanks! Xin A=327.727 B=9517.336 p=0.114^10 (1-p)*y*(1-x)/x/(1-x^y)=A A(1+(1-x)*(1+y)/x-A))=B [[alternative HTML version deleted]]

Dear All, I am looking for an implementation in R of the Appell Hypergeometric function. Any suggestions will be more than appreciated! GP -- dr. Giovanni Parrinello External Lecturer Medical Statistics Unit Department of Biomedical Sciences Viale Europa, 11 - 25123 Brescia Italy Tel: +390303717528 Fax: +390303717488 email: parrinel at med.unibs.it

Hi I am writing some functionality for a multivariate PDF. One problem is that evaluating the normalizing constant (NC) is massively computationally intensive [one recent example took 4 hours and bigger examples would take much much longer] and it would be good allow for this in the design of the package somehow. For example, the likelihood function doesn't need the NC but (eg) the

Hello List please find a new package, multipol, recently uploaded to CRAN. This package generalizes the polynom package (which handles univariate polynomials) to the multivariate case. A short article discussing the package will appear in the next issue of Rnews, Insha'Allah enjoy -- Robin Hankin Uncertainty Analyst and Neutral Theorist, National Oceanography Centre, Southampton

I'm updating my vorbis rpm spec file, and when I try to do "make -C vorbis-tools ogg123", due to rpm's build environment, I get lots of: gcc ogg123.o -o ogg123 -lm ../lib/libvorbis.a ../lib/vorbisfile.a ../lib/vorbisfile.a(vorbisfile.o): In function `_get_prev_page': vorbisfile.o(.text+0x54): undefined reference to `ogg_sync_reset' vorbisfile.o(.text+0xa9): undefined

Dear developers Neither Math.Rd nor Log.Rd mention the branch cuts that appear for complex arguments. I think it's important to include such information. Please find following two context diffs for Log.Rd and Math.Rd. [The pedants amongst us will observe that both sqrt() and log() have a branch point at complex infinity, which is not mentioned in the patch. Comments anyone?] rksh