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404 results for “from:David Duffy”

Getting SNPS from PLINK to R
David Duffy · Jun 21, 2011 · r-help

snpMatrix package is quite nice (read.plink())

all pair comparisons in proportion analysis
David Duffy · Oct 5, 2012 · r-sig-mixed-models

Maybe glmer(cbind(abnormal, normal) ~ treatment*genotype + (1|batch), data=x, family=binomial())

A zero inflated Poisson model in MCMCglmm
David Duffy · Jul 4, 2012 · r-sig-mixed-models

Sewall Wright used an ordinal model for toes, IIRC ;). It might be more stable. Cheers, David Duffy,

lme: random effects for replicated growth curves
David Duffy · Aug 19, 2013 · r-sig-mixed-models

On Tue, 20 Aug 2013, Ben Bolker wrote: > "hmm, that looks complicated..." Now was that "HMM, that looks complicated", or "hglm, that looks complicated" ???

pedigreemm and heritability of binary data
David Duffy · May 7, 2012 · r-sig-mixed-models

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NCMCglmm technical help
David Duffy · Jun 22, 2020 · r-sig-mixed-models

In finadata.txt. you have ANIMID 3178 in twice, once as offspring of 1156 and 3104, and later as offspring of 1156 and 3065 (mergped as only the latter).

zero-truncated mixed effects logistic regression?
David Duffy · Jan 19, 2012 · r-sig-mixed-models

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Use of mixed models when the causal relations areunclear?
David Duffy · Feb 22, 2012 · r-sig-mixed-models

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snpStats reference allele used in genetic associations?
David Duffy · May 25, 2014 · r-help

francesca casalino <francy.casalino at gmail.com> asked: > > Does anyone know how to find the reference allele used for genetic > associations ran in snpStats? > A is ref allele, B is risk allele.

'Missing' tests for lmer models
David Duffy · Sep 25, 2012 · r-sig-mixed-models

You need to provide boring details like "sessionInfo()" on old and new machines, so we can see which versions of the packages you actually have installed, and whether your locale is weird...

Non-parametric 2x2 Mixed Factorial ANOVA in R?
David Duffy · Nov 12, 2012 · r-sig-mixed-models

On Tue, 13 Nov 2012, Ben Bolker wrote: > * you could try bootstrapping or permutation testing (being careful > to respect the grouping structure of the data lmPerm package may be useful for this

Bootstrap the variance difference
David Duffy · Feb 6, 2012 · r-sig-mixed-models

On Mon, 6 Feb 2012, Kevin Spring wrote: > I can't do it this way because the boot function only allows for one data > set to be inputted. So you tried one combined dataset and subset?

Help with Generalized Linear Model with Repeated Measures
David Duffy · Feb 17, 2011 · r-sig-mixed-models

On Thu, 17 Feb 2011, Quincy Elamore wrote: > pilotstudy.glm<-glmer(log.error~true_percentage + Distance + Angle +(1|Subject), > data=pilotstudy) This looks sensible to me, FWIW. You might say lmer rather than glmer. Cheers, David Duffy.

Hardy Weinberg
David Duffy · Jun 22, 2011 · r-help

> I am interested in simulating 10,000 2 x 3 tables for SNPs data with the > Hardy Weinberg formulation. Is there a quick way to do this? I am assuming > that the minor allelle frequency is uniform in (0.05...

Question regarding large data.frame in LMER?
David Duffy · Dec 15, 2020 · r-sig-mixed-models

I have not done any comparisons versus other programs, but: https://mran.microsoft.com/package/HMMEsolver where the algorithm is described in Kim (2017) A Fast Algorithm for Solving Henderson's Mixed Model Equation https://arxiv.org/pdf/1710.09663

Very different results from lmer and MCMCglmm
David Duffy · Jan 31, 2012 · r-sig-mixed-models

What did you get from MCMCglmm(...family="gaussian")? -- | David Duffy (MBBS PhD) ,-_|\ | email: davidD at qimr.edu.au ph: INT+61+7+3362-0217 fax: -0101 / * | Epidemiology Unit, Queensland Institute of Medical Research \_,-._/ | 300 Herston Rd, Brisbane, Queensland 4029, Australia...

R-help Digest, Vol 13, Issue 17
David Duffy · Mar 17, 2004 · r-help

Cristian Pattaro asked: > is there a automatic method to obtain Odds Ratio estimates and their > confidence intervals from a GLM Logistic model? something like: oddsr<-function(x) { require(MASS) round(exp(cbind(Odds.Ratio=coef(x), confint(x))),3) } oddsr...

"whole factor" effects for categorical variable (3levels) in glmmPQL ?
David Duffy · Dec 8, 2013 · r-sig-mixed-models

On Mon, 9 Dec 2013, marieline gentes wrote: > I simply want to report the fact that year (categorical, three levels) > What is the proper way to do this ? Should I not be using glmmPQL ? You could use Anova() from John...

MCMCglmm installation error
David Duffy · Feb 8, 2011 · r-sig-mixed-models

Before anyone else says it -- upgrade your version of R and try again. Cheers, David Duffy. -- | David Duffy (MBBS PhD) ,-_|\ | email: davidD at qimr.edu.au ph: INT+61+7+3362-0217 fax: -0101 / * | Epidemiology Unit, Queensland Institute of Medical...

pnorm, qnorm
David Duffy · Aug 12, 2004 · r-help

Trenkler, Dietrich said: > > I found the following strange behavior using qnorm() and pnorm(): > > > x<-8.21;x-qnorm(pnorm(x)) > [1] 0.0004638484 > > x<-8.28;x-qnorm(pnorm(x)) > [1] 0.07046385 > > x<-8.29;x-qnorm(pnorm(x...

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