How to write trycatch in R

Question

I want to write trycatch code to deal with error in downloading from the web.

url <- c(
    \"http://stat.ethz.ch/R-manual/R-devel/library/ba         


        

Answer 1

R uses functions for implementing try-catch block:

The syntax somewhat looks like this:

result = tryCatch({
    expr
}, warning = function(warning_condition) {
    warning-handler-code
}, error = function(error_condition) {
    error-handler-code
}, finally={
    cleanup-code
})

In tryCatch() there are two ‘conditions’ that can be handled: ‘warnings’ and ‘errors’. The important thing to understand when writing each block of code is the state of execution and the scope. @source