CODEWITHSUNDEEP
r
cs0815
cs0815

Reputation: 17418

making code that throws exception not terminate loop

I am trying this (apologies this is not reproducible but hopefully someone can help please):

for (row in 1:nrow(combinations)) {

    tryCatch({
            ba_search <- BayesianOptimization( 
            aq_function,
            bounds = bayesian_search_bounds
            # some more parameters
             )
         },
     finally = {
     
        if (exists("ba_search")) {
            # do something with the results
        } else {
            # do some default because of exception
        }
     }
     
     })
}

The intention is to execute:

# do some default because of exception

if an exception occurs, rather than terminate the script/loop.

Unfortunately, the script/loop still terminates. Any help to fix this would be very much appreciated. Thanks!

Upvotes: 2

Views: 42

Answers (1)

Waldi
Waldi

Reputation: 41240

The error handling is done by an error function, not by finally, see Exceptions handling. The following loop runs as expected:

for (row in 1:3) {
  
  tryCatch({
    print(row)
    if (row==2) {ba_search <- "ba_search created"}
    stop("Error triggered")
      # some more parameters
  },
  error = function(c){
    if (exists("ba_search")) {
      # do something with the results
      print(paste("Error after ba_search creation",c))
    } else {
      # do some default because of exception
      print(paste("Error without ba_search:",c))
    }
  })
}

Upvotes: 1

Related Questions