How to force a For loop() or lapply() to run with error message in R
I edited @Rui Barradas idea of tryCatch()
.
You can try to do something like below.
The IsValues
will get either the link value or bad i
s.
IsValues <- list()
for (i in 1:length(link_questions)) {
question_to_pdf <- paste0("https://stackoverflow.com",
link_questions[i])
IsValues[[i]] <- tryCatch(
{
message(paste("Converting", i))
pagedown::chrome_print(question_to_pdf)
},
error=function(cond) {
message(paste("Cannot convert", i))
# Choose a return value in case of error
return(i)
})
}
Than, you can rbind your values and extract the bad i
s:
do.call(rbind, IsValues)[!grepl("\\.pdf$", do.call(rbind, IsValues))]
[1] "3" "5" "19" "31"
You can read more about tryCatch()
in this answer.