[R] inconsistency in tryCatch...

[akshay kulkarni]

dear Tim,
                Thanks...
________________________________
From: Ebert,Timothy Aaron <tebert using ufl.edu>
Sent: Thursday, June 23, 2022 1:13 AM
To: Jeff Newmiller <jdnewmil using dcn.davis.ca.us>; r-help using r-project.org <r-help using r-project.org>; akshay kulkarni <akshay_e4 using hotmail.com>; R help Mailing list <r-help using r-project.org>
Subject: RE: [R] inconsistency in tryCatch...

I am used to seeing a function like this:
> function_name <- function(arg_1, arg_2, ...) {
Function body
}

Where would I find documentation on building functions of the form of tryCatch?
In the form I am used to, the function would look like this:

tryCatch <- function(){
  print("fred")
}
tryCatch()



Tim

-----Original Message-----
From: R-help <r-help-bounces using r-project.org> On Behalf Of Jeff Newmiller
Sent: Wednesday, June 22, 2022 3:24 PM
To: r-help using r-project.org; akshay kulkarni <akshay_e4 using hotmail.com>; R help Mailing list <r-help using r-project.org>
Subject: Re: [R] inconsistency in tryCatch...

[External Email]

You defined a function. You did not call the function. tryCatch returned the object you defined. So the interactive console printed the object returned.

Invoking the "function" function does not call the defined function for you. Try:

tryCatch((function() print("fred"))(), error = function(e) sum(1:3), finally = sum(1:3))

On June 22, 2022 12:00:38 PM PDT, akshay kulkarni <akshay_e4 using hotmail.com> wrote:
>Dear members,
>                          I have the following code:
>
>        > tryCatch(function() print("fred"),  error = function(e) sum(1:3), finally = sum(1:3))
>         function() print("fred")
>
>The expected output from the tryCatch call should be to print "fred" to the console, and exit, but as seen above, it is outputting
>          function() print("fred")
>
>Can you people please shed some light on what is happening?
>
>thanking you,
>Yours sincerely,
>AKSHAY M KULKARNI
>
>       [[alternative HTML version deleted]]
>
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