greta is an R package for writing statistical models and fitting them by MCMC.
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.
website for more information, tutorials, examples, and package documentation.See the
You can install the current release version of the package (0.2.5) from GitHub:
I would love to hear any feedback, bug reports or feature requests via the issues tracker. I would also be very keen for contributions from anyone with time to spare!