I cannot get Rstan because my R version is too recent.
> install.packages("rstan")
Warning in install.packages :
package ‘rstan’ is not available (as a binary package for R version 3.1.3)
Is there anyway to download rstan for this version? Do I need to downgrade my R version in order to use rstan?
As pointed out by @Dason, rstan is not on CRAN. The line to install rstan is on the getting started page. Here is the line:
source('http://mc-stan.org/rstan/install.R', echo = TRUE, max.deparse.length = 2000)
install_rstan()
My apologies for overlooking this.
Reinstalling rstan might fix this issue as well!