search for: trycatch

The following example involves a function whose on.exit() expression both generates an error and catches the error. The body of the function also generates an error. When calling the function wrapped in a tryCatch, should that tryCatch's error function be given the error from the body of the function, since the one from the on.exit has already been dealt with? Currently the outer tryCatch gets the error from the on.exit expression. xx <- function() { on.exit(tryCatch( expr = stop("error i...

Hello, I run a fisher.test() in a loop, with the issue that some of the data will not be useable. To protect the loop I used tryCatch but: sexsnp = rep(NA, 1750) for(i in 1:1750){tryCatch(sexsnp[i] = fisher.test(table(data[,3], data[,i + 38]))$p, error = function(e) print(NA))} Error: unexpected '=' in "for(i in 1:1750){tryCatch(sexsnp[i] =" But this works: for(i in 1:1750){tryCatch(sexsnp[i] <- fisher.tes...

Having a hard time understanding the help files for tryCatch. Looking for a little help with the following statement which sits inside a for loop zest[i] <- tryCatch(sapply(getNodeSet(zdoc, "//zestimate/amount"), xmlValue), error=function() zest[i] <-"NA") zest is a numeric vector If the sapply statement evaluates to an error, I&...

..."if", que si devuelve un error dentro de él se pare la ejecución de la función devolviendo un valor. El código que tengo, para las pruebas, es el siguiente: prueba<-function(a){ b<-"no ha hecho stop" c<-"hago el stop" if(a<3){ variable<-"hola" tryCatch({ write("entro en el tryCatch","") d<-variable*3 },error=function(e){ return(c) stop(write("ha dado error","")) }) }else{ b<-a*a*a } return (b) } prueba(2) La salida que me devuelve R por pantalla es: entro en el tryCatch [1] "no ha hecho stop&q...

G'day Federico, On Wed, 17 May 2023 10:42:17 +0000 "Calboli Federico (LUKE)" <federico.calboli at luke.fi> wrote: > sexsnp = rep(NA, 1750) > for(i in 1:1750){tryCatch(sexsnp[i] = fisher.test(table(data[,3], > data[,i + 38]))$p, error = function(e) print(NA))} Error: unexpected > '=' in "for(i in 1:1750){tryCatch(sexsnp[i] =" Try: R> for(i in 1:1750){tryCatch(eval(expression("sexsnp[i] = fisher.test(table(data[,3], data[,i+38]))$...

Dear all, I am not sure I understand fully the functionality of "tryCatch" and "try" commands and how these are used to continue a for/next loop if an error occurs within the loop. Can somebody point me to material (or share some code) with more extensive examples than the ones in the help/FAQ pages? Do explain my problem in more detail: for (i in 10...

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:...

...put the bottle on the top shelf in the same room that the refrigerator is in (but not in the fridge itself) When you run the code with `<-` it, then the ith element of the global variable `sexsnp` is assigned the p-value. When you run the version with `=` then R tries to find an argument to `tryCatch` that matches (possibly partially) `sexsnp[i]` and gives the error because it does not find a match (not sure why it is not handled by `...`, but tryCatch may be parsed special, or non-legal argument names on the RHS of `-` may be checked). Unfortunately allowing `=` in certain common places to mi...

I'm confused by the page documenting tryCatch and friends. I think it describes 3 separate mechanisms: tryCatch (in which control returns to the invoking tryCatch), withCallHandlers (in which control goes up to the calling handler/s but then continues from the point at which signalCondition() was invoked), and withRestarts (I can't tell w...

I would like to do inserts into a database table, but do updates in the fairly rare cases in which the inserts fail. I thought tryCatch might be the way to do it, but I honestly do not understand the help file for tryCatch at all. I thought something like this might work: for (i in seq(along = tbl$key)) { tryCatch(sqlSave(pg, tbl[i, ], "tbl", append = TRUE, rownames = FALSE), if (fails) do {sqlUpdate(pg, tbl[...

Hello all, I'm a beginner in R working on a script that will produce a set of models (linear, polynomial and logistic) for each location in a dataset. However, the self-starting logistic model often fails - if this happens I would like to just skip to the next iteration of the loop using tryCatch. I've looked at a few examples and read the help file, but didn't understand tryCatch in the context of my script. Any help or suggestions (even telling me where to insert the tryCatch command) would be much appreciated!! Below is the script I am currently working on: data<-read.cs...

I would like to use the 'tryCatch' function but am having a hard time getting my head around it. In 'C' like languages try/catch/finally means try a block of statements and if any throw an error then do the statements in the catch block and then error or not always do the staements in the finally block. In 'R' a...

...nto it. luke On Fri, 1 Dec 2017, William Dunlap via R-devel wrote: > The following example involves a function whose on.exit() > expression both generates an error and catches the error. > The body of the function also generates an error. > > When calling the function wrapped in a tryCatch, should > that tryCatch's error function be given the error from the > body of the function, since the one from the on.exit has > already been dealt with? Currently the outer tryCatch gets > the error from the on.exit expression. > > xx <- function() { > on.exit(tryCat...

So after about 4 hours struggling with Try and TryCatch I am throwing in the towel. I have a more complicated function that used logspline through iterative distributions and at some point the logspline doesnt function correctly for some subsets but is fine with others so I need to be able to identify when the error occurs and stop curtailing the distr...

...t, I could be sourcing local files instead ans=null;error=null; for ( sym in sym.vec){ try(ans=cbind(ans,get.hist.quote(sym,start=start))) #accumulate in a zoo matrix catch(theurlerror){error=c(error,sym)} #accumulate failed symbols } I know the code above does not work, but it conveys the idea. tryCatch help page says it is similar to Java try-catch, but I know how to do a try-catch in Java and still can't do it in R. Thank you very much. stephen

... or just put the R expression inside curly brackets, e.g. tryCatch({ sexsnp[i] = fisher.test(table(data[,3], data[,i+38]))$p }, error=function(e) print(NA)) Exercise: Compare > list(a = 2) $a [1] 2 with > list({ a = 2 }) [[1]] [1] 2 and > list(b = { a = 2 }) $b [1] 2 BTW, note how the latter two assigned a <- 2 to the global environment. /Hen...

Hi everyone, When dealing with errors, sometimes I want to run a bunch of code when an error occurs. For now I usually use a structure such as: res <- tryCatch(expr, error = function(cond) cond) # or try(expr) if (inherits(res, ?error?)) # or inherits(res, ?try-error?) # a bunch of code I though it would be useful to have a function that does this naturally, so I came up with the attached function. I would be glad to hear your insights and if you thi...

i wonder about the following examples showing incoherence in how type conversions are done in r: x = TRUE x[2] = as.raw(1) # Error in x[2] = as.raw(1) : # incompatible types (from raw to logical) in subassignment type fix it seems that there is an attempt to coerce the raw value to logical here, which fails, even though as.logical(as.raw(1)) # TRUE likewise, x[2]

i wonder about the following examples showing incoherence in how type conversions are done in r: x = TRUE x[2] = as.raw(1) # Error in x[2] = as.raw(1) : # incompatible types (from raw to logical) in subassignment type fix it seems that there is an attempt to coerce the raw value to logical here, which fails, even though as.logical(as.raw(1)) # TRUE likewise, x[2]

...R C funs to corresponding R functions is as follows. error -> stop warning -> warning REprintf -> message Rprintf -> cat Rprint/cat is of course not an exception, I listed it just for completeness. The inconsistency I would like to report is about REprintf. It cannot be caught by tryCatch(message). Warnings are errors are being caught as expected. Is there any chance to "fix"/"improve" REprintf so tryCatch(message) can catch it? So in the example below catch(Cmessage()) would behave consistently to R's catch(message("a"))? Regards, Jan Gorecki ca...