**Six Sigma Tools for Quality Control and Improvement** (**SixSigma**)

Functions and utilities to perform Statistical Analyses in the Six Sigma way. Through the DMAIC cycle (Define, Measure, Analyze, Improve, Control), you can manage several Quality Management studies: Gage R&R, Capability Analysis, Control Charts, Loss Function Analysis, etc. Data frames used in the books ‘Six Sigma with R’ (Springer, 2012) and ‘Quality Control with R’ (Springer, 2015) are also included in the package.

**Vulgar Fractions in R** (**fractional**)

The main function of this package allows numerical vector objects to be displayed with their values in vulgar fractional form. This is convenient if patterns can then be more easily detected. In some cases replacing the components of a numeric vector by a rational approximation can also be expected to remove some component of round-off error. The main functions form a re-implementation of the functions ‘fractions’ and ‘rational’ of the MASS package, but using a radically improved programming strategy.

**Remote R: Control a Remote R Session from a Local One** (**remoter**)

A set of utilities for controlling a remote R session from a local one. Simply set up a server (see package vignette for more details) and connect to it from your local R session, including ‘RStudio’. Network communication is handled by the ‘ZeroMQ’ library by way of the ‘pbdZMQ’ package. The client/server framework is a custom ‘REPL’.

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