rpackages

In my work, I make extensive use of the statistical software package/environment R. One of the great strengths of R is the large number of add-on packages that extend the functionality of R (i.e., the functionality of the base/standard packages that are installed by default) in various ways. Here, I keep track and list packages that I make use of on a (semi)regular basis. My work would be many magnitudes more difficult if these packages (and R itself!) did not exist.

- survival: For time-to-event data / Cox proportional hazards regression models.
- flexclust: Useful cluster algorithms.
- aods3: For analyzing overdispersed counts and proportions.
- censReg: For censored regression (Tobit) models.
- betareg: For beta regression.
- VGAM: For vector generalized linear and additive models.

- boot: As the name implies, for bootstrapping.
- car: Package to accompany
*An R Companion to Applied Regression*by Fox and Weisberg (2011). I occasionally make use of some functions from this package such as`linear.hypothesis`

and`Anova`

. - lsmeans: To obtain least-squares means.
- glmulti: Information theoretic methods for model selection and multimodel inference.
- sandwich and clubSandwich: For (cluster) robust inferences using the Eicker-Huber-White method.
- mice: For multiple imputation.
- MatchIt: For propensity score matching.

- The stats package already provides a useful collection of optimizers (
`optimize`

,`optim`

,`nlminb`

,`constrOptim`

,`nlm`

functions). For root finding, I use the`uniroot`

function. - minqa: Several derivative-free optimizers.
- dfoptim: Includes another implementation of the Nelder-Mead algorithm (as in
`optim`

) and the Hooke-Jeeves algorithm. - ucminf: Another derivative-free, quasi-Newton type algorithm.
- numDeriv: For numerical calculation of first and second order derivatives.

- Matrix: For working with dense and sparse matrices.
- gsl: Wrapper for some functions from the GNU Scientific Library.

- MASS: Package to support
*Modern Applied Statistics with S*by Venables and Ripley (2002). Includes many useful functions, but mentioned here because of the`mvrnorm`

function for generating data from a multivariate normal distribution and`fitdistr`

for fitting univariate distributions. - mvtnorm: For the multivariate normal and t distribution.
- BiasedUrn: For the noncentral hypergeometric distribution.
- CompQuadForm: For the distribution function of quadratic forms.
- SuppDists: For some other distributions.

- metafor: Obviously (I wrote it).
- meta: Another nice package for meta-analysis.
- metaSEM: For approaching meta-analysis from a structural equation modeling (SEM) perspective.
- Since meta-analysis is one of my primary research areas, I have played around with most packages mentioned under the Meta-Analysis Task View.

- psych and psychometric: Lots of functions for psychometric analyses (e.g., principal component analysis, factor analysis, reliability analysis).
- GPArotation: Includes various rotation methods for factor analysis.
- OpenMx: Another package for structural equation modeling; have used this mostly just for twin models.

- parallel: For parallel/multicore processing.

- graphics: I am an old fart when it comes to graphics, sticking mostly to 'base graphics' (I don't actually have any strong opinions on 'base graphics' versus 'ggplot2'; I got into R before ggplot2 or even ggplot was around and just learned how to get all my graphing done with the tools available at the time – and that still works for me).
- lattice: But occasionally I use trellis-type graphics (especially in combination with multilevel or longitudinal data).
- igraph: For drawing network graphs/analysis.
- viridis and viridisLite: Some very nice color maps.
- RColorBrewer: And more color schemes.
- MASS: The
`kde2d`

function for 2d kernel density estimation and plotting. - hexbin: Another approach for creating scatterplots that indicate the density of particular areas.
- scatterplot3d and rgl: When I want to show off with 3-dimensional plots.
- extrafont: For making use of additional fonts in graphs.
- Cairo: For the Cairo graphics device.

- pander: For pandoc markdown.

- sos: For searching through all contributed R packages on CRAN.

rpackages.txt · Last modified: 2018/12/13 11:15 by Wolfgang Viechtbauer

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