the call to the icar_normal distribution should be:
phi ~ icar_normal(N, node1, node2), not icar_normal_lpdf(....
back when this model was developed, the Stan compiler allowed this.
for later versions of Stan, this might result in a warning -
I think we're still allowing this as many people made the same mistake -
I naively thought that if you define a function, then you call it by its name.
but a sampling statement is not quite the same thing as a function call -
the Stan compiler maps the distribution name to a corresponding
distribution function, e.g., the sampling statement y ~ normal(mu, sigma)
is compiled to a call to the function normal_lpdf(y | mu, sigma).
ConnorDonegan
commented
3 years ago
the call to the icar_normal distribution should be:
phi ~ icar_normal(N, node1, node2), noticar_normal_lpdf(....back when this model was developed, the Stan compiler allowed this. for later versions of Stan, this might result in a warning - I think we're still allowing this as many people made the same mistake - I naively thought that if you define a function, then you call it by its name. but a sampling statement is not quite the same thing as a function call - the Stan compiler maps the distribution name to a corresponding distribution function, e.g., the sampling statement
y ~ normal(mu, sigma)is compiled to a call to the functionnormal_lpdf(y | mu, sigma).