I want to display the stan code in Rmarkdon not using {stan} chunk. Now I'm searching the way of extracting the stan code from stan file(.stan) but, I can only find the way extracting stan code from stanfit object.
Is there any function in Rstan package or other packages ? If there are some solution, please teach me how to do.
I'm slightly confused. The Stan file itself is the Stan code. Hence, displaying the Stan code in Rmarkdown is very straightforward, if you do not wish to use the Stan chunk:
writeLines(readLines("filename.stan"))
Let me know if this was not what you wanted.