Write statistical models in R and fit them by MCMC and
optimisation on CPUs and GPUs, using Google 'TensorFlow'. greta lets
you write your own model like in BUGS, JAGS and Stan, except that you
write models right in R, it scales well to massive datasets, and it’s
easy to extend and build on. See the website for more information,
including tutorials, examples, package documentation, and the greta
forum.