How to change warning setting?

r warnings options
VincentH picture VincentH · Jun 28, 2012 · Viewed 13k times · Source

I am trying to debug a function. I would like to display warnings when they occur but I don't understand how to change the warning settings.

Answer

Ben Bolker picture Ben Bolker · Jun 28, 2012

It may be useful to specify

options(warn=2, error=recover)

As mentioned by @plannapus, warn=2 will upgrade warnings to errors; error=recover will drop you into a debug/browser mode at the point where the warning (now upgraded to an error) occurred. (Use options(warn=0, error=NULL) to restore the original settings.)

Related questions

Warning message: In `...` : invalid factor level, NA generated

I don't understand why I got this warning message. > fixed <- data.frame("Type" = character(3), "Amount" = numeric(3)) > fixed[1, ] <- c("lunch", 100) Warning message: In `[<-.factor`(`*tmp*`, iseq, value = "lunch") : invalid factor level, NA generated &…

Read More
How to suppress warnings globally in an R Script

I have a long R script that throws some warnings, which I can ignore. I could use suppressWarnings(expr) for single statements. But how can I suppress warnings in R globally? Is there an option for this?

Read More
Warning: closing unused connection n

getCommentary=function(){ Commentary=readLines(file("C:\\Commentary\\com.txt")) return(Commentary) close(readLines) closeAllConnections() } I have no idea what is wrong with this function. When I run this in R, it keeps giving me the following warning: Warning message: closing …

Read More