Exception handling in R

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Answer 1

Basically you want to use the tryCatch() function. Look at help("tryCatch") for more details.

Here's a trivial example (keep in mind that you can do whatever you want with an error):

vari <- 1
tryCatch(print("passes"), error = function(e) print(vari), finally=print("finished")) 
tryCatch(stop("fails"), error = function(e) print(vari), finally=print("finished")) 

Have a look at these related questions:

• Equivalent of "throw" in R
• catching an error and then branching logic
• https://stackoverflow.com/search?q=[r]+trycatch