Draw samples from the generated quantities block of a stanmodel.

# S4 method for stanmodel
gqs(object, data = list(), draws,
seed = sample.int(.Machine\$integer.max, size = 1L))

## Arguments

object An object of class stanmodel. A named list or environment providing the data for the model or a character vector for all the names of objects used as data. See the Passing data to Stan section in stan. A matrix of posterior draws, typically created by calling as.matrix on a stanfit. The seed for random number generation. The default is generated from 1 to the maximum integer supported by R on the machine. When a seed is specified by a number, as.integer will be applied to it. If as.integer produces NA, the seed is generated randomly. The seed can also be specified as a character string of digits, such as "12345", which is converted to integer.

## Methods

object

signature(object = "stanmodel")

Evaluate the generated quantities block of a Stan program by supplying data and the draws output from a previous Stan program.

## Value

An object of S4 class stanmodel representing the fitted results.

stanmodel, stanfit, stan

## Examples

if (FALSE) {
m <- stan_model(model_code = 'parameters {real y;} model {y ~ normal(0,1);}')
f <- sampling(m, iter = 300)
mc <-
'
parameters {real y;}
generated quantities {real y_rep = normal_rng(y, 1);}
'
m2 <- stan_model(model_code = mc)
f2 <- gqs(m2, draws = as.matrix(f))
f2
}