Validate one MCMC count argument and return it as an integer

as.integer() on its own lets a nonsensical count through. thin = 0 is the one that bites: slice_sample() then runs warmup iterations and no kept ones, and returns its zero-initialized array of draws with diagnostics computed on it. The counts are checked here, before anything is stored on the posterior object.

Usage

check_mcmc_count(value, name, min, why = NULL)

Arguments

value

The supplied value.

name

Argument name, for the error message.

min

Smallest value allowed.

why

Optional clause explaining the bound.