R help - Dec 2011 - Keep sourcing when there is an error

Hello,

I want to know if there is any way to avoid source() stopping when there 
is an error.
Here is the content of my Main.R script:

source("~/R/source/Constructor1.R")  # Object1 should be constructed
ifelse(exists("Object1"),            # It's an S4 object
        print("Object1 exists"),      # I can't avoid using
'validity'
        print("Object1 doesn't exist."))

source("~/R/source/Main.R") is stopped at the first line when the
object
isn't valid, the three other lines aren't sourced.

Thank you in advance.
--
Ronan

Would wrapping the problematic part in try() solve your problem?

On Tue, Dec 13, 2011 at 3:24 PM, Ronan Maron <ronanm2 at gmail.com>
wrote:
> Hello,
>
> I want to know if there is any way to avoid source() stopping when there is
> an error.
> Here is the content of my Main.R script:
>
> source("~/R/source/Constructor1.R") ?# Object1 should be
constructed
> ifelse(exists("Object1"), ? ? ? ? ? ?# It's an S4 object
> ? ? ? print("Object1 exists"), ? ? ?# I can't avoid using
'validity'
> ? ? ? print("Object1 doesn't exist."))
>
> source("~/R/source/Main.R") is stopped at the first line when the
object
> isn't valid, the three other lines aren't sourced.
>
> Thank you in advance.
> --
> Ronan
>
-- 
Sarah Goslee
http://www.functionaldiversity.org

?try or ?tryCatch  or ?withCallingHandlers


-- Bert

On Tue, Dec 13, 2011 at 12:24 PM, Ronan Maron <ronanm2 at gmail.com>
wrote:
> Hello,
>
> I want to know if there is any way to avoid source() stopping when there is
> an error.
> Here is the content of my Main.R script:
>
> source("~/R/source/Constructor1.R") ?# Object1 should be
constructed
> ifelse(exists("Object1"), ? ? ? ? ? ?# It's an S4 object
> ? ? ? print("Object1 exists"), ? ? ?# I can't avoid using
'validity'
> ? ? ? print("Object1 doesn't exist."))
>
> source("~/R/source/Main.R") is stopped at the first line when the
object
> isn't valid, the three other lines aren't sourced.
>
> Thank you in advance.
> --
> Ronan
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.


-- 

Bert Gunter
Genentech Nonclinical Biostatistics

Internal Contact Info:
Phone: 467-7374
Website:
http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm

Okay,
try(Object1 <- constructorFunction(args))  # in Constructor1.R
works fine.

Thank you.

Also, you should probably be using if and else here rather than ifelse. 

Michael

On Dec 13, 2011, at 5:43 PM, Ronan Maron <ronanm2 at gmail.com> wrote:
> Okay,
> try(Object1 <- constructorFunction(args))  # in Constructor1.R
> works fine.
> 
> Thank you.
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.