Dear Henrik, Simon, and Adrian,
As it turns out Adrian's admisc::tryCatchWEM() *almost* does what I want, which
is both to capture all messages and the result of the expression (rather than
the visible representation of the result). I was easily able to modify
tryCatchWEM() to return the result
Simon's suggestion with withCallingHandlers() is the correct way.
Also, note that if you use tryCatch() to catch warnings, you're
*interrupting* the evaluation of the expression of interest, e.g.
> res <- tryCatch({ message("hey"); warning("boom"); message("there"); 42 },
> warning = function(w)
Dear John,
I have a function in package admisc called tryCatchWEM (catches warnings,
errors and messages):
> tryCatchWEM(foo())
$warning
[1] "warning1" "warning2"
Hope this helps,
Adrian
On Thu, 2 Dec 2021 at 23:04, Fox, John wrote:
> Dear R-devel list members,
>
> Is it possible to capture m
Adapted from demo(error.catching):
> W=list()
> withCallingHandlers(foo(), warning=function(w) { W <<- c(W, list(w));
> invokeRestart("muffleWarning") })
> str(W)
List of 2
$ :List of 2
..$ message: chr "warning 1"
..$ call : language foo()
..- attr(*, "class")= chr [1:3] "simpleWarnin
Dear R-devel list members,
Is it possible to capture more than one warning message using tryCatch()? The
answer may be in ?conditions, but, if it is, I can't locate it.
For example, in the following only the first warning message is captured and
reported:
> foo <- function(){
+ warning("warn
