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14 results for “from:Nik Tuzov”

Weighted regression in REML
Nik Tuzov · Oct 16, 2018 · r-sig-mixed-models

Hello: I'mreading the book of Searle: http://www.leg.ufpr.br/~eder/Variance%20Components.pdf Ithink that equation 53 on p 276 suggests that if one wants to useweights in REML, the solution is very similar to that in...

Weighted regression in REML
Nik Tuzov · Oct 16, 2018 · r-sig-mixed-models

Hello: I'm reading the book of Searle: http://www.leg.ufpr.br/~eder/Variance%20Components.pdf I think that equation 53 on p 276 suggests that if one wants to use weights in REML, the solution is very similar...

Weighted regression in REML
Nik Tuzov · Oct 16, 2018 · r-sig-mixed-models

Hello: I'm reading the book of Searle: http://www.leg.ufpr.br/~eder/Variance%20Components.pdf I think that equation 53 on p 276 suggests that if one wants to use weights in REML, the solution is very similar...

Weighted regression in REML
Nik Tuzov · Oct 16, 2018 · r-sig-mixed-models

Hello: I'm reading the book of Searle: http://www.leg.ufpr.br/~eder/Variance%20Components.pdf I think that equation 53 on p 276 suggests that if one wants to use weights in REML, the solution is very similar...

Tackling of convergence issues in gamlss vs glm2
Nik Tuzov · May 10, 2018 · r-help

Hello: I'd like to know how and if the GLM convergence problems are addressed in gamlss. For simplicity, let's focus on Normal and Negative Binomial with log link. The convergence issues of the glm() function were alleviated in...

Learning advanced R
Nik Tuzov · Mar 13, 2018 · r-help

Hello: Could you please suggest the best way to become an "advanced" R programmer. I went through "R for dummies" by de Vries and Meys and I can see two ways to proceed: 1) Get a more advanced textbook. E...

Package gamlss used inside foreach() and %dopar% fails to find an object
Nik Tuzov · Mar 9, 2018 · r-help

Hello all: Please help me with this "can't find object" issue. I'm trying to get leave-one-out predicted values for Beta-binomial regression. It may be the gamlss issue because the code seems to work when %do...

Finding the best package for a mixed Poisson model
Nik Tuzov · Nov 22, 2019 · r-sig-mixed-models

Hello: Couldyou help me get oriented among various packages to fit a mixedPoisson model. The goal is to find a relatively fast method that cantake at least two random factors, possibly with interaction, e.g.: Y~ fixed part + A + B...

Package gamlss used inside foreach() and %dopar% fails to find an object
Nik Tuzov · Mar 9, 2018 · r-help

Hello Jeff: Thanks for replying. I made a mistake in my original post. The same error is generated with %do% as well, so it seems to be gamlss-related. Nik ----- Original Message ----- From: "Jeff Newmiller" <jdnewmil at dcn.davis.ca...

Package gamlss used inside foreach() and %dopar% fails to find an object
Nik Tuzov · Mar 12, 2018 · r-help

Hello Mikis: Thanks a lot, it worked. Could you tell me what the problem was? Regards, Nik ----- Original Message ----- From: r-help-request at r-project.org To: "r-help" Sent: Sunday, March 11, 2018 6:00:02 AM Subject...

A theoretical question : usage of AIC and similar information criteria for mixed models
Nik Tuzov · Nov 1, 2018 · r-sig-mixed-models

Hello all: I was wondering if you could comment on this theoretical question. You are probably familiar with the book of Burnham & Anderson: https://www.amazon.com/Kenneth-Burnham-Selection-Multi-Model-Information-Theoretic/dp/B008UBJ0VQ/ref=sr_1_2...

Repeated measures - general question
Nik Tuzov · Oct 30, 2018 · r-sig-mixed-models

What is the best package to analyze RM data in R, given that time is on continuous scale and the time pointsare not equally spaced. Ideally, that package should match SAS results. Regards,Nik From: "r-sig-mixed-models-request...

Weighted regression in REML
Nik Tuzov · Oct 17, 2018 · r-sig-mixed-models

Hello Ben: Thanks for replying.? Unfortunately, it's hard for me or anyone else to determine when the copyright is violated. For instance,?"The elements of statistical learning" is available on Amazon for a hefty price of $63, and yet...

most conservative df for mixed effects anova (Carrie Perkins)
Nik Tuzov · Oct 16, 2019 · r-sig-mixed-models

Hello Carrie: Strictly speaking, the term conservative or aggressive should apply to the p-values rather than to the degrees of freedom.I assume you are asking what approach generates the largest p-value for your fixed effect of interest...

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