search for: plackett

Dear R users, Can someone inform me about a library/function in R that fits a Plackett-Dale model ? Thanks in advance Pryseley --------------------------------- [[alternative HTML version deleted]]

My google search for Plackett's Algorithm didn't return too much except that Plackett's algorithm appears to be useful in Control Theory - it is elaborated as "Plackett's algorithm for on-line recursive least squares estimation". Sounds something like what I want. I am looking at developing a user mo...

...alternative designs primarily in terms of their "estimation capacity" = percent of models of certain types that are actually estimable, following Li and Nachtsheim (2000) ?Model Robust Factorial Designs?, Technometrics, pp. 345-352. I propose to start with a half-fraction of a 12-run Plackett-Burman in 6 runs and a 2^3 in 8 runs, then move selected points to a middle value to obtain 3-level designs to compare in terms of estimation capacity. After I get the 3-factor design, then I can split each of those runs into 2 plots for the 4th factor. The problem is complicated because the cl...

Hi all, Has anyone used the qua.regressCOP2 function from the copBasic package??? The default copula function used in this function is plackett copula and I wanted to use archimedean copula. Attached below is my code: mycop<-frankCopula V=seq(0.001,0.99,by=0.000217) R<-qua.regressCOP2(0.25,V,cop=mycop,para=c(3.504)) And this is the error I get: Warning messages: 1: In qua.regressCOP2(0.25, V, cop = mycop, para = c(3.504)) : could...

Hi, It appears that there is no package for estimating log linear models (L. Goodman's family) for data in the form of frequency tables. Am I wrong? Thanks Marwan Khawaja Research Coordinator Fafo, Institute for Applied Social Science N-0608 Oslo, Norway Tel +47 22 08 86 00 +47 22 08 86 94 (Direct) +47 22 67 33 05 (Private) Fax +47 22 08 87 00