我试图了解我的Rstan代码在做什么错...请注意,数据只是一些模拟数据。
运行ar1_stan_fit时收到以下错误消息:
if(nchar(CXX)== 0){时错误:参数长度为零 另外:警告消息: 在system2(file.path(R.home(component =“ bin”),“ R”)中,args = paste(“ CMD config”,: 运行命令''/Library/Frameworks/R.framework/Resources/bin/R'CMD config CXX14 2> / dev / null'的状态为1”
有何评论?
代码:
library(rstan)
rstan_options(auto_write = TRUE)
options(mc.cores = parallel::detectCores())
ar1.stan <- '
data {
int<lower=0> N;
vector[N] y;
}
parameters {
real mu;
real phi;
real<lower=0> sigma;
}
model {
// Priors
sigma ~ normal(0, 1);
mu ~ normal(0, 1);
phi ~ normal(0, 1);
// Model
for (n in 2:N)
y[n] ~ normal(mu + phi * y[n-1], sigma);
}'
AR1_1 <- ar_sim(0.3)
data <- list(N = 200, y = AR1_1)
ar1_stan_fit <- stan(model_code = ar1.stan, data = data)