similar to: [R logs] Help in develop a simply logs package

Hello, I want to use withCallingHandlers(expr, warning = function(w) { ....}), that is, to use a custom warning handler. I want this handler to replicate the behavior of the usual handler. I have problems with the mode 'options(warn = 0)' where the warnings are delayed, except if calling 'warning("message", immediate. = TRUE). Indeed, if my custom warning handler

>From https://github.com/HenrikBengtsson/Wishlist-for-R/issues/70 : ... and follow up note from 2018-03-15: Ouch... in R-devel, stopifnot() has become yet 4-5 times slower; ... which is due to a complete rewrite using tryCatch() and withCallingHandlers(). >From https://stat.ethz.ch/pipermail/r-devel/2017-May/074256.html , it seems that 'tryCatch' was used to avoid the following

My points: - The 'withCallingHandlers' construct that is used in current 'stopifnot' code has no effect. Without it, the warning message is the same. The overridden warning is not raised. The original warning stays. - Overriding call in error and warning to 'cl.i' doesn't always give better outcome. The original call may be "narrower" than 'cl.i'. I

With tryCatch() it is possible to catch interrupts with tryCatch(). Then you can use a 'finally' statement to clean up, release resources etc. However, how can I "protect" against additional interrupts? This is a concern when the hold down Ctrl+C and generates a sequence of interrupts. Example: tryCatch({ cat("Press Ctrl+C...\n"); Sys.sleep(5); }, interrupt =

When batch processing analysis, I use tryCatch() for failure handling and to prevent unwanted interrupts. I write detailed progress to log file and conditions (warnings and errors) are written to the same log file immediately by using withCallingHandlers(..., condition=function(c) cat(c, file=logFile)). However, I would also like to write the call stack to the log file to further simplify

Hi, folks! I'm trying to pull in data using read.csv("my URL goes here"), and it really works fantastically. Amazing to pull in live data right off the internet, into RAM, and get busy... however... occasionally there is a server problem, or the data are not up yet, and instead of pushing through a nice CSV file, the server sends a 404 "Not Found" page... Since the

Dear expeRts, I am struggling with warning/error handling. I would like to call a function which can produce either a) normal output b) a warning c) an error Since the function is called several (thousand) times in a loop, I would like to proceed "quietly" and collect the warnings and errors [to deal with them at a later point]. I have seen constructs with tryCatch (which can

Not desperately important, but nice to have and possibly of use to others, is the ability to suppress specific warnings rather than suppressing warnings indiscriminately. I often know of a specific warning that I want to ignore (because I know that's it's a false positive/ignorable), but the current design of suppressWarnings() forces me to ignore *any* warnings coming from the

Dear all, For an open-source project that I'm working on (1), which uses R for all its heavy lifting but includes a wrapper shell script, I was hoping to find a way to capture all warnings (and, in fact, errors too), and handle them in my own way. I realise I can do this for a single expression using something like: > f <- function(w) print(w$message) >

Hello, I apologized if this had already been addressed, and I also submitted this problem on SO: http://stackoverflow.com/questions/20268021/how-to-catch-warnings-sent-during-s4-method-selection Example code: setGeneric('my_method', function(x) standardGeneric('my_method') ) setMethod('my_method', 'ANY', function(x) invisible())

Hi, I am facing one problem of fetching R warning messages in Java Code using Rserve. It is easier to trap R Error messages by using catching RSrvException. I came to know one way of fetching R Warning messages, i.e. using "withCallingHandlers", below is my Java Program, which uses withCallingHandlers of R : import org.rosuda.JRclient.*;

The suppressMessages and suppressWarnings functions currently suppress all the message or warnings that are generated by the input expression. The ability to suppress only specific messages or warnings is sometimes useful, particularly for cases like file import where there are lots of things that can go wrong. Suppressing only messages that match a regular expression has rightly been rejected

Hello, 1. The Situation : ------------------------ The stack traceback is not available when error ouccured in a try(....) -- test.R -------------------------------- f<-function(a){ return ( log(a) ) } try(f("A")) traceback() ------------------------------------------- I get the following message : > try(f("A")) Error in log(x) : Non-numeric argument to mathematical

Dear list! I have a script that processes a large number of data files. When one file fails to process correctly, I want the script to write a message and to continue with the next file. I achieved this with tryCatch: for (f in files) tryCatch({heavy.lifting(f)}, error=function(e) log.error.to.file(e)) I also want to log warning messages and tried something like this: for (f in

I am running R as an invisible subprocess in another program (RExcel). Using try I can catch errors and print the errors produced by an R statement. Is there a way to know if running a statement caused a warning message? last.warning gives me the last warning, but I do not have any indication what the statement was that caused the message. I can of course store last warning before I run a

Thanks Luke, On 10 September 2015 at 14:47, <luke-tierney at uiowa.edu> wrote: > Conditions have classes and the condition system is designed around > the idea that classes would be used for this sort of thing. That is > already how tryCatch and withCallingHandlers discriminate the > conditions to handle. That makes sense. Though with my sqrt example, it's just a plain

Hello when my code executes I receive the message that were some warnings. I want to catch warning messages at run time so to print some local variables and try to understand why this warning happens. I searched on internet and I tried withCallingHandlers( which seems to work but as I used Rkward the result is awful. I get a prompt to copy paste a value only while at the same time my background

You can capture warnings by using withCallingHandlers. Here is an example, its help file has more information. dataList <- list( A = data.frame(y=c(TRUE,TRUE,TRUE,FALSE,FALSE), x=1:5), B = data.frame(y=c(TRUE,TRUE,FALSE,TRUE,FALSE), x=1:5), C = data.frame(y=c(FALSE,FALSE,TRUE,TRUE,TRUE), x=1:5)) withWarnings <- function(expr) { .warnings <- NULL # warning handler will

Hello R-help, I've noticed that my 'parallel' jobs take too much memory to store and transfer to the cluster workers. I've managed to trace it to the following: # `payload` is being written to the cluster worker. # The function FUN had been created as a closure inside my package: payload$data$args$FUN # function (l, ...) # withCallingHandlers(fun(l$x, ...), error =

A private reply by Martin made me realize that I was wrong about stopifnot(exprs=TRUE) . It actually works fine. I apologize. What I tried and was failed was stopifnot(exprs=T) . Error in exprs[[1]] : object of type 'symbol' is not subsettable The shortcut assert <- function(exprs) stopifnot(exprs = exprs) mentioned in "Warning" section of the documentation similarly fails