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Interrupt long evaluations

Source: R/timed.R
timed.Rd

This function interrupts an evaluation after a certain number of seconds. Note the limitations documented in setTimeLimit.

Usage

timed(expression, seconds = Inf, on_time_out = "silent")

Arguments

expression

[expression]
An R expression to be evaluated.

seconds

[numeric(1)]
The number of seconds.

on_time_out

[character(1)]
Defines what action to take if the evaluation time exceeded, either:

  • "error" to throw an error exception

  • "warning" to return NULL along with a warning

  • "silent" (the default) to just return NULL

Value

The value of expression or, if the evaluation time exceeded, whatever is specified for on_time_out.

See also

Other function helpers: do.call_timed(), function_arguments(), function_body(), function_defaults(), quiet(), try_silent(), variable_name()

Examples

foo <- function(x) {
  for (i in 1:10) Sys.sleep(x / 10)
  return(x)
}
timed(foo(0.5), 1)
#> [1] 0.5
timed(foo(1.5), 1)
#> NULL