similar to: R-help

Hi, I am working on a project about hospital efficiency. Due to the high multicolinearlity of the data, I want to fit the model using ridge regression. However, I believe that the data from large hospital(indicated by the number of patients they treat a year) is more accurate than from small hosptials, and I want to put more weight on them. How do I do this with lm.ridge? I know I just need

Dear R-help, I have a four-part question about regression, matrices, and sandwich package. 1) In the sandwich package, I would like to better understand the meat() function. >From the bread() documentation, for a simple OLS regression, bread() returns (1/n * X'X)^(-1) That is, for a simple regression (per the documentation on bread()): MyLM <- lm(y ~ x) bread(MyLM)

Dear list, how can I compute the inverse of the X'WX matrix ("inverse of the weighted sum of squares and crossproducts matrix") from an object of class "lm" from a weigthed linear regression? Thanks, Sven

Hi Rowland, good point... That seems to be the only SID which popps up in the logs from the Synology device. I found no other. I'm just looking at the same log on my working machines if this is popping up there, too. At least you gave me good hints, how I can answer their request. Thanks for that... Regards Ingo https://github.com/WAdama Rowland Penny via samba schrieb am 21.06.2023

Hi all, When I install a new package, and don't yet know any function names, I have to play the "poor man's game" to get to the standard help system "Index" page for the package: Poor Man's Game -=20 Load new package;=20 issue search() command; find position (say N) of loaded package;=20 issue objects(pos =3D N) command; get name of a random function (san

[Env: Win Xp] Is there any options() setting or call to help() or help.start() that will allow me to view a help file for a package built under R 2.10.x under R 2.9.2? I'm using both R 2.9.2 and R 2.10.1, but prefer the former because the CHM help is so much easier to use. Yet, if I install a package built for R 2.10.x, I can't find *any* way to display a help file in this package.

On 04/08/2009 7:33 PM, Steven McKinney wrote: >> -----Original Message----- >> From: Duncan Murdoch [mailto:murdoch at stats.uwo.ca] >> Sent: Tuesday, August 04, 2009 8:03 AM >> To: Steven McKinney >> Cc: r-devel at stat.math.ethz.ch; R-bugs at r-project.org >> Subject: Re: [Rd] Wishlist: Navigate to "Index" page of help when no >> topic

On 7/28/2009 6:30 PM, smckinney at bccrc.ca wrote: > Hi all, > > When I install a new package, and don't yet know any function names, > I have to play the "poor man's game" to get to the standard > help system "Index" page for the package: You could complain to the package author or maintainer, who should have created a help alias with the package name

> -----Original Message----- > From: Duncan Murdoch [mailto:murdoch at stats.uwo.ca] > Sent: Tuesday, August 04, 2009 8:03 AM > To: Steven McKinney > Cc: r-devel at stat.math.ethz.ch; R-bugs at r-project.org > Subject: Re: [Rd] Wishlist: Navigate to "Index" page of help when no > topic specified (PR#13860) >=20 > On 7/28/2009 6:30 PM, smckinney at bccrc.ca

> -----Original Message----- > From: Duncan Murdoch [mailto:murdoch at stats.uwo.ca] > Sent: Tuesday, August 04, 2009 5:06 PM > To: Steven McKinney > Cc: 'r-devel at stat.math.ethz.ch'; 'R-bugs at r-project.org' > Subject: Re: [Rd] Wishlist: Navigate to "Index" page of help when no > topic specified (PR#13860) >=20 > On 04/08/2009 7:33 PM,

Hi, I would need some help in solving a problem with my R. Whenever I try to type " ?paste " or in general any command for the html help in R, I receive this error message. The strange thing is that I have never had this kind of problem in the past with R, and now I really don't understand why it says that. Also I have selected every single element in the installation process. The

I just built a package in R (version 2.1.1 on a Linux machine) and then moved it to my computer (R version 2.8.1 on a Windows machine). When I loaded the package and tried to open help for one of the commands, I got the following warning: Warning message: In print.help_files_with_topic("F:/R/R-2.8.1/library/REEMtree/chm/RMSE") : No CHM help for 'RMSE' in package

Hello, Apologies in advance if this should be in R-devel, not Rhelp. I did read through the R-devel thread started by Gabor Grothendieck in September of this year - I am getting the exact same error using a new computer that has XP installed, not vista, complaining that the file hhc.exe is not found. I have downloaded the hhc.exe to HTML Help Workshop dir in Program Files but it says that

I am using the ginv function from MASS and have run across this problem that I do not understand. If I define the matrix A as below, its g-inverse does not satisfy the Moore-Penrose condition A %*% ginv(A) %*% A = A. The matrix A is X'WX in a quadratic regression using some very large dollar values. The much simpler matrix B does satisfy the MP condition. Am I doing something wrong? Is

Hi list, can I extract the cov.unscaled ("the unscaled covariance matrix") from a gls fit (package nlme), like with summary.lm? Background: In a fixed effect meta analysis regression the standard errors of the coefficients can be computed as sqrt(diag(cov.unscaled)) where cov.unscaled is (X'WX). I try do do this with a gls-fit. Thanks, Sven

Hi! I have used the Matrix package (Version: 0.995-10) successfully to obtain the OLS solution for a problem where the design matrix X is 44000x6000. X is very sparse (about 80000 non-zeros elements). Now I want to do WLS: (X'WX)^-1X'Wy I tried W=Diagonal(length(w),w) and wX=solve(X,W) but after various minutes R gives a not enough memory error (Im using a 64bit machine with 16Gigs

On 20/06/2023 20:29, Rowland Penny via samba wrote: > > > On 20/06/2023 20:16, Ingo Asche via samba wrote: >> Rowland Penny via samba schrieb am 20.06.2023 um 21:01: >> >>> Try adding to the bug report. >> Would that be ok even it's happening on a Synology? Just don't want to >> mess around. > > I personally can see no reason not to, at

I understand that the hat matrix is a function of the predictor variable alone. So, in the following example why do the values on the diagonal of the hat matrix change when I go from an unweighted fit to a weighted fit? Is the function hatvalues giving me something other than what I think it is? library(ISwR) data(thuesen) attach(thuesen) fit <- lm(short.velocity ~ blood.glucose)

Hi, I was trying to read some help of functions and in all functions I try to see is giving me this error: > ?write.table Erro em print.help_files_with_topic("C:/ARQUIV~1/R/R-29~1.0/library/utils/chm/write.table") : CHM file could not be displayed Anybody knows what is happening? Atenciosamente, Leandro Lins Marino Centro de Avalia??o Funda??o CESGRANRIO Rua Santa Alexandrina,

Hello everyone, I hope this is a fair enough question, but I don’t have access to a copy of Bates and Pinheiro. It is probably quite obvious but the answer might be of general interest. If I fit a fixed effect with an added quadratic term and then do it as an orthogonal polynomial using maximum likelihood I get the expected result- they have the same logLik.