Rscript_call: Call a function in a new R session via 'Rscript()'

In yihui/xfun: Supporting Functions for Packages Maintained by 'Yihui Xie'

Call a function in a new R session via Rscript()

Description

Save the argument values of a function in a temporary RDS file, open a new R session via Rscript(), read the argument values, call the function, and read the returned value back to the current R session.

Usage

Rscript_call(
  fun,
  args = list(),
  options = NULL,
  ...,
  wait = TRUE,
  fail = sprintf("Failed to run '%s' in a new R session.", deparse(substitute(fun))[1])
)

Arguments

fun	A function, or a character string that can be parsed and evaluated to a function.
args	A list of argument values.
options	A character vector of options to passed to Rscript(), e.g., "--vanilla".
..., wait	Arguments to be passed to system2().
fail	The desired error message when an error occurred in calling the function.

Value

The returned value of the function in the new R session.

Examples

factorial(10)
# should return the same value
xfun::Rscript_call("factorial", list(10))

# the first argument can be either a character string or a function
xfun::Rscript_call(factorial, list(10))

# Run Rscript starting a vanilla R session
xfun::Rscript_call(factorial, list(10), options = c("--vanilla"))

yihui/xfun documentation built on April 29, 2024, 12:16 p.m.