search for: theories

Hello, well, I searched list-archive, cran and the references, but found nothing. Thus: Does anybody around here know anything about Dempster-Shafer Theory, Evidence Theory or Hints in R? Has anybody stumbled about a package that I overlooked or implemented something in this area? I really would like to not implement a hint-model a second time. My apologies if I missed something obvious, but I

Version 1.0-0 of DAKS (Data Analysis and Knowledge Spaces) has been released to CRAN. Knowledge space theory is a recent psychometric test theory based on combinatorial mathematical structures (order and lattice theory). Solvability dependencies between dichotomous test items play an important role in knowledge space theory. Utilizing hypothesized dependencies between items, knowledge

Version 1.0-0 of DAKS (Data Analysis and Knowledge Spaces) has been released to CRAN. Knowledge space theory is a recent psychometric test theory based on combinatorial mathematical structures (order and lattice theory). Solvability dependencies between dichotomous test items play an important role in knowledge space theory. Utilizing hypothesized dependencies between items, knowledge

Hey, this is my first post... i'm new with Speex and i'm interested in the theory behind this compressino scheme... has anyone of you worked with the theory of this codec? -----BEGIN GEEK CODE BLOCK----- Version 3.1 GED/J d-- s:++>: a-- C++(++++) ULU++ P+ L++ E---- W+(-) N+++ o+ K+++ w--- GE/CS/MU d-- s:- a-- C++(++) SL P L+ E-- W++(+) N K+ w++ o? M V-- PS+ PE Y+ PGP !t 5 X++ R tv+ b++

This has nothing to do with R as such; I'm simply trying to exploit the vast resource of knowledge and expertise that resides in the R community. For my sins, I am teaching a course on Game Theory this term. Game Theory I know from ***nothing***. I am trying to learn the subject as I go along, staying perhaps half a step in front of the students. I am having considerable difficulty with

Hi my friends, I'm very new to R and need your help. I used R and ltm package for item response theory (IRT) modeling. I also need to compute differential item function (DIF) for IRT models. I searched the archive but basically found nothing. Could you help me find some sources about handling DIF of IRT? Many thanks in advance! Feng

I just realized (after many discussion with friends), that I might need to solve a (classical) graph theory problem with R. My specific problem is called: Minimum vertex cover <http://en.wikipedia.org/wiki/Vertex_cover#Definition> for a hypergraph <http://en.wikipedia.org/wiki/Hypergraph> (Please see the links for a formal explanation, also with some pictures) Which is another way of

Hi, Is there any package in R which i can use for Coalescent Theory/Genelogical Trees? Is this possible to use R function in C language? I would be very thankful to you. Regards, ++++++++++++++++++++++++++++++++++++++++++++++ MUHAMMAD FAISAL Department of Statistics and Decion Support system, University of Vienna,Austria:: Send Me Message at Yahoo Res. # +4314796696104, Cell #

dev.new(width=6, height=1.5,mar=c(0,0,0,0)) par(mfrow=c(1,1),mar=c(.5, .5, 1.5, .5), oma=c(.4, 0,.5, 0)) barplot(c(1,1,1,1,1,1),col=c("blue","purple","red","green","orange","yellow"), axes = FALSE) I have a barplot that returns six colors in a line. I would like to get the same six color blocks in a hexagram layout (if it were a clock,

I have a new device that takes measurements anywhere from every second, to every 15 minutes (depending on changes). The matrix has a date, time and Y column (Y is the measurement). For three days it is 25,000 rows. How do I average the measurements by every 30 minutes so my matrix is 48 rows per day? I have been working on this and cannot figure out a simple method. Any ideas? Thank you. ----- In

Hi, folks, As I understand, Least-squares Estimate (second-moment assumption) and the Method of Maximum Likelihood (full distribtuion assumption) are used for linear regression. I do >?lm, but the help file does not tell me the model employed in R. But in the book 'Introductory Statistics with R', it indicates R estimate the parameters using the method of Least-squares. However it

Any package that implements Random matrix theory application in R. I am completely new to this subject, so just wanted to explore it. Cheers ../Murli

Why don't you implement and uplad the package to CRAN? On 27 Jun 2017 17:45, "Chris Buddenhagen" <cbuddenhagen at gmail.com> wrote: Does anyone know of some code, and examples that implement game theory/Nash equilibrium hypothesis testing using existing packages like igraph/statnet or similar? Perhaps along the lines of this article: Zhang, Y., Aziz-Alaoui, M. A., Bertelle,

Before coding this in C, I wanted to test the idea out in R. But I'm unsure if the theory is well-founded. I have a (user-supplied) black-box function which takes R^n -> R^3 and a defined domain for each of the input reals. I want to send some samples through the box to determine an approximation of the convex hull of the function's range. (I'll use the library from

Hi, This message is to let the R developers know that the pdfs for the first two volumes of the printed edition of R reference manual are available at, http://www.network-theory.co.uk/R/base/vol1.pdf http://www.network-theory.co.uk/R/base/vol2.pdf I've divided the manual into "core commands" of the base package (control flow, and related programming commands, etc) in Volume 1

Does anyone know of some code, and examples that implement game theory/Nash equilibrium hypothesis testing using existing packages like igraph/statnet or similar? Perhaps along the lines of this article: Zhang, Y., Aziz-Alaoui, M. A., Bertelle, C., & Guan, J. (2014). Local Nash Equilibrium in Social Networks, *4*, 6224. Best, Chris Buddenhagen cbuddenhagen at gmail.com [[alternative HTML

Hi, I work with a medical education company and we are interested in implementing item response theory for our question bank. A few packages for this already exist in R. We are looking for an expert R developer to facilitate the implementation with our data. This would be an ongoing relationship for a part-time consultant. Please respond with a resume/CV and your availability. Thanks, Nachi

I''m a little unclear on theory here. I have a number of tables but specifically... clients placements facilities A client may have only 1 placement A placement may have only 1 client but there may be many placements per client. A placement may have only 1 facility A facility may have only 1 placement but there may be many placements per facility I''m wondering if it is

Hi Everyone, I want to fine tune the Rx and Tx gain on an analogue Sangoma card by dialing into another server that is running on Sangoma PRI card (both services on Bell network). [mwatt1004khz] exten => s,1,Answer exten => s,n,PlayTones(1004/1000) exten => s,n,Wait(300) If I match the Rx/Tx numbers on both sides by monitoring "ztmonitor X -vv" am I right with my theory of

...it's like they were regenerated incorrectly. Checking backups showed these files were last changed (to their short form) on Feb 11; yum.log doesn't show any sign of updates on that date, so presumably it wasn't something like a kernel installation running amok. Does anyone have any theories as to what happened? Random logical guesses is fine ;-) Thanks, Craig Miskell, Technical Support, AgResearch Invermay 03 489-9279 "Usenet is like a herd of performing elephants with diarrhea -- massive, difficult to redirect, awe-inspiring, entertaining, and a source of mind- boggling am...