rstan unavailable on Posit Cloud Connect

Posit Professional & Hosted Products Posit Package Manager
1

I have some teaching demos which use rstan output.

  1. If I have library(rstan) or library(rstanarm) the system tries to compile them and runs out of memory.
  2. I tried running the MCMC step on my own machine, and then loading the result. The code looks like this:
:::{.callout-note}
I can't run stan on the server, so I'll run it first on my local file and save the 
result.
```r
library(rstanarm)  
cars.mcmc <- stan_glm(dist~speed,data=cars,refresh=0)
saveRDS(cars.mcmc,"cars_mcmc.RDS")
```
The next bit of code will read the results from a file instead of running stan.
:::

```{r}
cars.mcmc <- readRDS("cars_mcmc.RDS")
cars.coef <- as.matrix(cars.mcmc$stanfit)
print(cars.mcmc)
```

The first part I run on my local machine. The problem is that at the readRDS step, there is a hidden dependency on rstan so I can't load the output file.

I can work around in this simple example, but I have some other files where I would like to use shinystan and have the students explore the stan output.

2

Hi @ralmond, do you have any more details on the R version in use, whether it was rstan or rstanarm specifically that failed, and what the versions of rstan and rstanarm were? This info may be visible in the deployed doc's logs or history. Just trying to find out whether we can have the packages precompiled rather than installed from source.