A utility function that aims to streamline the set up of the required future backend with sensible defaults for most users of regional_epinow. More advanced users are recommended to setup their own future backend based on their available resources.

setup_future(
reported_cases,
strategies = c("multisession", "multisession"),
min_cores_per_worker = 4
)

## Arguments

reported_cases

A data frame of confirmed cases (confirm) by date (date), and region (region).

strategies

A vector length 1 to 2 of strategies to pass to future::plan. Nesting of parallisation is from the top level down. The default is to set up nesting parallisation with both using future::multisession (future::multicore will likely be a faster option on supported platforms). For single level parallisation use a single strategy or future::plan directly. See ?future::plan for options.

min_cores_per_worker

Numeric, the minimum number of cores per worker. Defaults to 4 which assumes 4 MCMC chains are in use per region.

## Value

Numeric number of cores to use per worker. If greater than 1 pass to stan_args = list(cores = "output from setup future") or use future = TRUE. If only a single strategy is used then nothing is returned.