search for: theory

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 would be glad if someone could give me a hint. Regards,...

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 space theory...

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 space theory...

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+...

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 several elementary points, (vis-a-vis two person non-zero-sum games) and have not yet succeeded in clar...

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 saying &...

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. # +...

...t (if it were a clock, the blocks would be at 12, 2, 4, 6, 8 and 10 o'clock). Is this possible with R? I do not know java or c++ to make this with GUI, so I have been doing it in R instead and it has worked great, except now I need to change the layout just a bit. Thank you, Adele ----- In theory, practice and theory are the same. In practice, they are not - Albert Einstein -- View this message in context: http://r.789695.n4.nabble.com/barplot-in-hexagram-layout-tp3807600p3807600.html Sent from the R help mailing list archive at Nabble.com.

...g 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 theory, practice and theory are the same. In practice, they are not - Albert Einstein -- View this message in context: http://r.789695.n4.nabble.com/Averaging-uneven-measurements-by-time-with-uneven-numbers-of-measurements-tp3499337p3499337.html Sent from the R help mailing list archive at Nabble.com.

...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 assumes the error is iid N(o,sigma^2). Am I correct? Is there any general way (like RSiteSearch() ) to find out what the model (theory) is for specific function? Let's say how to find out the assumption and the model used for rlm. Thanks Yi [[alternative HTML version deleted]]

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, C., & Guan, J. (2014). Local Nash Equilibrium in Social Networks, *4*, 6224. Best, Chris Buddenhagen cbuddenhagen at g...

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 http://...

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 and additional commands grouped by subject (graphics, date-time calculations, mod...

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 g...

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 [[al...

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 pla...

...ing 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 getting the analogue channel quality as close to the PRI channel as possible (and in turn get the best quality sound on analogue lines)? I can't find a Type 102 Milliwatt for Toronto area to test with but I think my PRI should be a perfect test system???!!! The milliwatts provided by Bell t...

Hi all, Recently, after doing some maintenance on one of my servers (Centos 5), I rebooted. On reboot, it didn't find the SAN disks at all, and after some poking around in maintenance mode, I discovered that it couldn't find the Qlogic module. It turns out that /lib/modules/<kernel-version>/modules.alias, modules.dep and such were all empty or just had their header comment lines.