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6 results for “from:Rodrigo Travitzki”

multilevel analysis with sample weighted data
Rodrigo Travitzki · Aug 28, 2014 · r-sig-mixed-models

Dear R masters, I'm looking for a R package to do multilevel analysis of a weighted data (is a weigthed sample of brazilian educational data) but could not find it. There is just a "weights" option in lme(), but...

Clarifications on implementation of lmer (lme4) in R -weights
Rodrigo Travitzki · Jun 21, 2015 · r-sig-mixed-models

Christian, as far as I know (not much) the use of 'lm' weights is similar to 'lmer', but not to 'lme' functions. But you can use both of them, because the weight is a covariate of the variance. Basically, if...

lmer confint() bootstrap doesn't match fitted values when weighted
Rodrigo Travitzki · Jun 29, 2016 · r-sig-mixed-models

Dear masters, I found a strange behaviour in confint() bootstrap methods, maybe something with my data, I don't know. My data is weighted and is something related to it, as you can see in code below. Best, Rodrigo ## run...

sample with two weights in different levels
Rodrigo Travitzki · Jun 15, 2015 · r-sig-mixed-models

Hi guys, the problem of using data with (one) weight in nlme was solved! (as Ben explained here: https://stat.ethz.ch/pipermail/r-sig-mixed-models/2014q3/022570.html). Now, the problem is how to use two weights, one...

multilevel analysis with sample weighted data
Rodrigo Travitzki · Aug 29, 2014 · r-sig-mixed-models

On 28-08-2014 14:52, Ben Bolker wrote: > On 14-08-28 07:01 AM, Rodrigo Travitzki wrote: >> Dear R masters, >> I'm looking for a R package to do multilevel analysis of a weighted data >> (is a weigthed...

multilevel analysis with sample weighted data
Rodrigo Travitzki · May 28, 2015 · r-sig-mixed-models

Ben, you are right, "weights=varFixed(~I(1/n))" seems to work like a charm! And my apologies to the MLwiN team, which do a great job. In time: in order to use multiple weigths (in different levels), we have...

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