search for: demeli

Hi all. Has anyone ever done a Deming Regression in R? I'm wondering if there's a simple way to do it. Thanks for all your help! -Ed -- View this message in context: http://www.nabble.com/Deming-Regression-tp17949318p17949318.html Sent from the R help mailing list archive at Nabble.com.

Hi, I have a dataset which has var1 from 1 sourse and var2 from 2 different methods. I need a new variable such that var2 values from both methods can beused as 1 variable. I believe deming regression can be used to do this. I just don't know how to do it. My data looks like: idvar1var2method1var2method2 11.22.1NA 21.62.4NA 31.52.2NA 41.3NA2.8 51.6NA3.1 61.4NA2.7 Please help. Sincerely,

Dear all, After a thorough research, I still find myself unable to find a function that does linear regression of 2 vectors of data using the "total least squares", also called "orthogonal regression" (see : http://en.wikipedia.org/wiki/Total_least_squares) instead of the "ordinary least squares" method. Indeed, the "lm" function has a

Dear R users, I have a question about the patterned variance-covariance structure for the random effects in linear mixed effect model. I am reading section 4.2.2 of "Mixed-Effects Models in S and S-Plus" by Jose Pinheiro and Douglas Bates. There is an example of defining a compound symmetry variance-covariance structure for the random effects in a split-plot experiment on varieties of

Hi, I am dealing with the following problem. There are two biochemical assays, say A and B, available for analyzing blood samples. Half the samples have been analyzed with A. Now, for some insurmountable logistic reasons, we have to use B to analyze the remaining samples. However, we can do a comparative study on a small number of samples where we can obtain concentrations using both A and

Dear R users, I am trying to use "muhaz" and "plot.muhaz" functions in "muhaz" package to estimate and plot hazard funciton. However function "muhaz" always gives error message "Error in Surv(times, delta) : object "times" not found". I could not even run their sample codes in the user's manual as follows: data(ovarian)

I wanna to do a Regression type 2 or Regression with X measured with error....anybody knows how can i make it in R?? thanks! -- View this message in context: http://r.789695.n4.nabble.com/Regression-type-2-x-measured-with-error-tp3251875p3251875.html Sent from the R help mailing list archive at Nabble.com.

I am trying to understand better an analysis mean RT in various conditions in a within subjects design with the overall mean RT / subject as one of the factors. LME seems to be the right way to do this. using something like m<- lme(rt~ a *b *subjectRT, random= ~1|subject) and then anova(m,type = "marginal"). My understanding is that lme is an easy interface for dummy coding

Hi, All Thanks to Robert Baskin, Thomas Lumley, and Spencer Graves for the valuable helps. I have learned a lot from this discussion. I put all discussions together without editing, so we can see how things are evolved. Likely, I have a lot of articles to read. As in the discussion, mixed modeling approach is a poosible but may be over-kill in my posted data analyses. I will explore other

Dear R users, Does anybody know if there is an R function (package) to fit a two-terms exponential model like y = a*exp(bx) + c*exp(dx) where y is dependent variable and x is independent variable. MATLAB has a Curve Fitting Toolbox to implement this fitting, but I don't know if there is an R package for this fitting. Thank you! Deming Mi

Surely you hear plenty about what''s not working, so I thought I''d shoot a quick message on something that did work. I got Windows Server 2008 RC2 installed. I have yet to even activate it and prove all internal features/devices work, but installation alone satisfied me! I had to fight a couple issues and I''ll mention them here, i think they''d be pretty

Hello R-users, thanks to Brian Ripley and Roger Peng for there prompt replies on installing R on a Solaris 64-bit machine. R is now running and seems to be doing fine. I realy would like to have access to the manuals so I can climb most of the learning curve on my own -- I am a long time user of Splus, hence I am not expecting the learning curve to be too steep. On the Sun machine that R is

Dear R-Users, is there any statement to fit a orthogonal regression in R environment? Many thanks in advance. Best regards, Vito Diventare costruttori di soluzioni Became solutions' constructors "The business of the statistician is to catalyze the scientific learning process." George E. P. Box "Statistical thinking will one day be as necessary for efficient

Hello there, apologies for cross-posting my question is not an S/R question but there is so much knowledge concentrated in those lists that I thought someone could point me in the right direction. A few months ago I read an article in a referenced journal comparing some data mining programs, among which there was Insightful's I Miner, SAS' Entreprise Miner, SPSS' Clementine (I think)

Hello, I am installing R on a Sun Solaris 64-bit machine. I followed the instructions in the "R Installation and Administration" guide. I am amazed at how much is going on during the installation process and I congratulate the people who have put all this together for the ones amongst us who don't have the required skills to do it. The installation went fairly well I think, I got

Hello R-users, is it possible to navigate from one workspace to the other from within an R session or does one has to close R and restart it from the directory where resides the desired workspace? For example from Splus I have this little function, see at the end, which I used all the time to navigate between valid Splus directories. I find this particularly usefull when I develop new

Hello, I am running: R version 2.10.0 (2009-10-26) Copyright (C) 2009 The R Foundation for Statistical Computing ISBN 3-900051-07-0 on a RedHat Linux box with 48Gb of memory. I am trying to create a model.matrix for a big model on a moderately large data set. It seems there is a size limitation to this model.matrix. > dim(coll.train) [1] 677236 128 > coll.1st.model.mat <-

Hi All, Can we stop this thread pl. This lady has no intentions to learn asterisk. She is just a troll and wasting our time. With her corporate attitude, what she expects is support that available with paid commercial products. Her company has enough money to buy commercial products, let she go there. Hey lady, whoever u are, dont waste our time. this is not for u. Lets move on to something

It looks to me that R-forge has been down for at least two hours now...

Hola, le escribo para comentarle que le he enviado por la ma?ana una invitaci?n al congreso nacional para los responsables, encargados o personal relacionado con el departamento de compras y suministros en las empresas este 24 y 25 de agosto. En este evento nos reuniremos hom?logos de todo M?xico donde se podr?n crear nuevas relaciones comerciales y fomentar nuevos negocios, adem?s de recibir