I really like this machine, and it certainly has made my data analysis work easier and more pleasurable.
Sunday, March 31, 2013
I recently bought a Linux desktop computer ("Leopard Extreme") from System76. It has a six-core Intel Core I7 CPU, 64 GB memory, and an Intel SSD. I have to replace the Ubuntu system, which came pre-installed, with Mint to make it fully functional.
Saturday, March 16, 2013
It seems RStan compiles the program every time the "stan_code = " option in "stan" command was invoked. The best way to avoid this is to do it once:
fit1 <- stan(model_code = "stan.model," chains = 1, data = data)
Then call it using the "fit" option:
fit2 <- stan(fit="fit1," data=data, iter = 10000)
Or do it in parallel way:
mclapply(1:4, mc.cores = 8,
function(i) stan(fit = fit1, chains = 1, chain_id = i, refresh = -1))
fit3 <- sflist2stanfit(sflist1)