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I'm currently working on a project where I'm trying complete a task in a for loop. There are a lot of areas where something can go wrong (it involves creating a pdf report via rmarkdown), but in this case I don't care if something goes wrong, I just want the for loop to keep going.

In the toy example below I would like to be able to print off the numbers 2 through 16, while skipping over the letter 'a'. 

something<-function(x){
print(x + 1)
}

for(i in c(1:10,'a',11:15))
{
  res <- try(something(i))
  if(inherits(res, "try-error"))
  {
    #error handling code, maybe just skip this iteration using
    next
  }
  #rest of iteration for case of no error
}

This is loosely based on the example provided in the answer below.

R Script - How to Continue Code Execution on Error.

I've tried adapting several other "how do I continue a for loop in R" to no success.

I'm not a full time programmer, so I'm convinced I'm missing something very simple, but any help would be appreciated.

Matt
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1 Answers1

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I had a similar issue, where I had a function I was running in a for loop and needed it to keep running if error comes up. Here's how I did it: 

OutputStorage=list()

for (i in 1:k){
  Output=tryCatch(examplefunction(x), error=function(e) NULL)
  OutputStorage[[i]]=Output
}

So if there is an output, it's stored in the list and if not, NULL is stored for that. I think it's working; running it just now actually. Hope that helps!

arenysus
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