Another major statistical processing environment is R (http://www.r-project.org/). It's an open source programming language and environment designed for statistical analysis. It's widely used with an active community and a growing body of useful add-on packages.
While there's no Clojure-specific interoperability library, there is one for Java, and we can use that to pass calls to R and to get results back. In this recipe, we'll set up this system.
We'll need to have R installed. We can download it from by following the link to CRAN, picking a mirror, and downloading the correct version of R for your platform.
You'll also need to have Maven (http://maven.apache.org/) installed to build and install the libraries for accessing R.