The 'Rcpp' package provides a C++ library to make it easier to use C++ with R. R and 'Rcpp' provide functions for a variety of statistical distributions.

Several R packages make functions available to R for additional statistical distributions. However, to access these functions from C++ code, a costly call to the R functions must be made. 'RcppDist' provides a header-only C++ library with functions for additional statistical distributions that can be called from C++ when writing code using 'Rcpp' or 'RcppArmadillo'. Functions are available that return a 'NumericVector' as well as doubles, and for multivariate or matrix distributions, 'Armadillo' vectors and matrices.

'RcppDist' provides functions for the following distributions: - the four parameter beta distribution; - the location-scale t distribution; - the truncated normal distribution; - the truncated t distribution; - a truncated location-scale t distribution; - the triangle distribution; - the multivariate normal distribution*; - the multivariate t distribution*; - the Wishart distribution*; and - the inverse Wishart distribution*. Distributions marked with an asterisk rely on 'RcppArmadillo'.