What is lme4 package?

What is lme4 package?

lme4-package. Linear, generalized linear, and nonlinear mixed models. Description lme4 provides functions for fitting and analyzing mixed models: linear (lmer), generalized linear (glmer) and nonlinear (nlmer.) Differences between nlme and lme4. lme4 covers approximately the same ground as the earlier nlme package.

Why is REML false?

If your random effects are nested, or you have only one random effect, and if your data are balanced (i.e., similar sample sizes in each factor group) set REML to FALSE, because you can use maximum likelihood. If your random effects are crossed, don’t set the REML argument because it defaults to TRUE anyway.

How do you cite lmerTest packages?

Citation. To cite lmerTest in publications use: Kuznetsova A., Brockhoff P.B. and Christensen R.H.B. (2017). “lmerTest Package: Tests in Linear Mixed Effects Models.” Journal of Statistical Software, 82(13), pp.

What is REML criterion?

In statistics, the restricted (or residual, or reduced) maximum likelihood (REML) approach is a particular form of maximum likelihood estimation that does not base estimates on a maximum likelihood fit of all the information, but instead uses a likelihood function calculated from a transformed set of data, so that …

How do I download a lmerTest package in R?

A Kenward-Roger method is also available via the pbkrtest package….

Package details
Version 3.1-3
Package repository View on CRAN
Installation Install the latest version of this package by entering the following in R: install.packages(“lmerTest”)

What is lme4 package in R?

Fit linear and generalized linear mixed-effects models. The models and their components are represented using S4 classes and methods.

What does numDF mean?

I am having a difficult time understanding the *meaning* of the numDF (degrees of freedom in the numerator), denDF (DF in the denomenator), as well as the Intercept term in the output.

How do you cite lme4 packages?

lme4 citation info. Bates D, Mächler M, Bolker B, Walker S (2015). “Fitting Linear Mixed-Effects Models Using lme4.” Journal of Statistical Software, 67(1), 1–48. doi: 10.18637/jss.

What package is LMER in R?

lme4 package
Maximum likelihood or restricted maximum likelihood (REML) estimates of the pa- rameters in linear mixed-effects models can be determined using the lmer function in the lme4 package for R.

What does Glmer mean?

glmer: Fitting Generalized Linear Mixed-Effects Models.