The function is used as a fail-safe if your R code sometimes works and sometimes doesn't,
usually because it depends on a resource that may be temporarily unavailable.
It tries to evaluate the expression max_tries times.
If all the attempts fail, it throws an error;
if not, the evaluated expression is returned.
Arguments
- expr
The expression to be evaluated.
- max_tries
The maximum number of attempts to evaluate the expression before giving up. Default is
5.- error_message
Additional custom error message to be displayed when an error occurs.
- retry_message
Message displayed when a new try to evaluate the expression would be attempted.
Value
The evaluated expression if successful, otherwise it throws an error if all attempts are unsuccessful.
Examples
f <- function() {
value <- runif(1, min = 0, max = 1)
if (value > 0.5) {
log_message("value is larger than 0.5")
return(value)
} else {
log_message(
"value is smaller than 0.5",
message_type = "error"
)
}
}
f_evaluated <- try_get(expr = f())
#> ℹ [2025-09-26 04:48:46] Value is larger than 0.5
print(f_evaluated)
#> [1] 0.7176185