by Joseph Rickert

September was a bit of a slow month for new R packages. Only 96 new packages showed up un CRAN. Nevertheless, I have picked out 23 for special mention which I have listed in 5 categories. I used the same selection criteria as I described in the post for August picks.

Data and Interfaces

• darksky V1.0.0: Provides an interface to the Dark Sky API which allows you to look up weather anywhere on the globe. 
• etseed V0.1.0: Provides a client to interface to the etcd key value store, a database written in Go.
• LendingClub V0.1.2: Lets investors manage their LendingClub investments from R.
• sparklyr V0.4: Allows R users to connect, provision and interface to Apache Spark. Detailed examples using MLlib and H2O are available on the RStudio site.
• trelloR: V0.1.0: Provides access to the Trello API. The vignette explains how to retrieve data from public and private Trello boards.
• XRPython V0.7: A Python interface structured according to the general form of the package XR described in John Chamber’s book Extending R.

Machine Learning

• ensembleR V0.1.0: Facilitates constructing ensemble models from machine learning models available in the caret package. There is a vignette to get started.
• exprso V0.1.7: Provides a framework for supervised machine learning customized for biologists. There are several vignettes including a cheatsheet.

• lowmemtkmeans V0.1.0: Implements trimmed k-means clustering with low memory use.
• Textmining V0.0.2: Provides functions for text and topic mining. Full functionality requires installing TreeTagger.

Plots and Visualizations

• plotluck V1.0.1: Is an intelligent tool built on top of ggplot2 that automatically generates plots from dataframes based on users providing variables to plot.
• plotwidgets V0.4: Provides functions to produce small, self contained plots for use in larger plots.

library(plotwidgets)
plot.new()
par(usr=c(-1,1,-1,1))
hues <- seq(0, 360, by=30)
pos <- a2xy(hues, r=0.75)
for(i in 1:length(hues)) {
  cols <- modhueCol(pal, by=hues[i])
  wgPlanets(x=pos$x[i], y=pos$y[i], w=0.5, h=0.5, v=v, col=cols)
}
pos <- a2xy(hues[-1], r=0.4)
text(pos$x, pos$y, hues[-1])

Statistics

• Barycenter V1.0.0: Provides algorithms to compute the Wasserstein barycenter, the mean of a set of empirical probability measures.
• musica V0.1.3: Provides functions for working with multivariate time series and custom time scales. There is a vignette to help you get started.
• nhstplot V1.0.0: Provides functions to graphically illustrate the most common null hypothesis significance tests. The vignette provides some examples, e.g.:

library(nhstplot)
plotftest(4,3,5)

• nimble V0.6-1: Allows R programmers to write statistical models in the BUGS language. NIMBLE is built in R but compiles in C++. There is extensive documentation at www.nimble.org
• Rdice V1.0.1: Allows conducting sophisticated dice rolling and coin tossing experiments including experiments with Efron like Nontransitive dice. Have a look at the vignette.
• splines2 V0.1.0: Provides functions for constructing a variety of splines that are not available in the splines package including B-splines,M-splines, I-splines, C-splines, and the integral of B-splines. There is a vignette.
• scanstatistics V0.1.0: Provides scan statistics functions to detect anomalous clusters in spatial or space-time data. The vignette describes the methodology and presents examples as well.
• thief V0.2: Implements methods for generating forecasts at different temporal frequencies using hierarchical time series.

Misc

• GeneralTree V0.0.1: Implements a general tree data structure in R. There is a tutorial.
• radiant V0.6.0: Radiant is a platform for business analytics based on R and Shiny.
  RDocumentation V0.6: A wrapper for R’s documentation so that help documentation will appear as it does on www.rdocumentation.org.
• tableMatrix V0.8: Provides 2 classes extending data.table: tableList and tableMatrix.

With this post, I am up to date with new CRAN packages. I hope to make my package picks a regular, monthly feature of this blog.