R help - Oct 2011 - program never enters browser mode when I add browser()

Dear All

I have a program that breaks at the following lines of code:

bigfunction {
... 

object1 = myfunction(x)
object2 = strsplit(object1, ",")[[1]]

...
}

where myfunction is defined elsewhere outside of bigfunction.  

The error I get is "error in strsplit() -- object1 not found".

However, when I insert browser() into my code so that the above reads,

bigfunction {
... 

browser()
object1 = myfunction(x)
object2 = strsplit(object1, ",")[[1]]

...
}

my entire program runs successfully, and oddly *never enters browser mode*.

Has anyone encountered a similar problem?  Any advice would be greatly
appreciated.

Thank you,
Michelle

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Short answer: I have not.

Long answer: Read the posting guide. Provide a reproducible example. Show actual
error messages. Identify your operating system and version of R. Read the
posting guide. Then try posting again.
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"M. Tran" <michellev.tran@gmail.com> wrote:

Dear All

I have a program that breaks at the following lines of code:

bigfunction {
... 

object1 = myfunction(x)
object2 = strsplit(object1, ",")[[1]]

...
}

where myfunction is defined elsewhere outside of bigfunction. 

The error I get is "error in strsplit() -- object1 not found".

However, when I insert browser() into my code so that the above reads,

bigfunction {
... 

browser()
object1 = myfunction(x)
object2 = strsplit(object1, ",")[[1]]

...
}

my entire program runs successfully, and oddly *never enters browser mode*.

Has anyone encountered a similar problem? Any advice would be greatly
appreciated.

Thank you,
Michelle

--
View this message in context:
http://r.789695.n4.nabble.com/program-never-enters-browser-mode-when-I-add-browser-tp3948920p3948920.html
Sent from the R help mailing list archive at Nabble.com.

_____________________________________________

R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.


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Hi Michelle,

In addition to Jeff's advice, can you now reproduce the original
error?  What you are describing is highly improbable if everything is
properly executed.  It becomes more likely if more was chagned between
running than just inserting browser().  For example, if you reran/had
made changes in other code you forgot to run and then sourced that
into R in addition to having added browser() to bigfunction.  If
browser() was really run, it should have come up, perhaps somewhere in
.... is something made the function return a value and terminate or
your code is written in such a way that the portion that browser() was
in was not run.

Right now this is all just speculation, further help will really
require more details to work with.

Cheers,

Josh

On Fri, Oct 28, 2011 at 12:04 PM, M. Tran <michellev.tran at gmail.com>
wrote:
> Dear All
>
> I have a program that breaks at the following lines of code:
>
> bigfunction > {
> ...
>
> object1 = myfunction(x)
> object2 = strsplit(object1, ",")[[1]]
>
> ...
> }
>
> where myfunction is defined elsewhere outside of bigfunction.
>
> The error I get is "error in strsplit() -- object1 not found".
>
> However, when I insert browser() into my code so that the above reads,
>
> bigfunction > {
> ...
>
> browser()
> object1 = myfunction(x)
> object2 = strsplit(object1, ",")[[1]]
>
> ...
> }
>
> my entire program runs successfully, and oddly *never enters browser mode*.
>
> Has anyone encountered a similar problem? ?Any advice would be greatly
> appreciated.
>
> Thank you,
> Michelle
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/program-never-enters-browser-mode-when-I-add-browser-tp3948920p3948920.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> 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.
>


-- 
Joshua Wiley
Ph.D. Student, Health Psychology
Programmer Analyst II, ATS Statistical Consulting Group
University of California, Los Angeles
https://joshuawiley.com/

I see two possibilities:

1) the call to 'browser' is inside an 'if'
clause that doesn't exectute.

2)  the call forgets the parentheses, so it is:

   browser

rather than

   browser()

On 28/10/2011 20:04, M. Tran wrote:
> Dear All
>
> I have a program that breaks at the following lines of code:
>
> bigfunction > {
> ...
>
> object1 = myfunction(x)
> object2 = strsplit(object1, ",")[[1]]
>
> ...
> }
>
> where myfunction is defined elsewhere outside of bigfunction.
>
> The error I get is "error in strsplit() -- object1 not found".
>
> However, when I insert browser() into my code so that the above reads,
>
> bigfunction > {
> ...
>
> browser()
> object1 = myfunction(x)
> object2 = strsplit(object1, ",")[[1]]
>
> ...
> }
>
> my entire program runs successfully, and oddly *never enters browser mode*.
>
> Has anyone encountered a similar problem?  Any advice would be greatly
> appreciated.
>
> Thank you,
> Michelle
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/program-never-enters-browser-mode-when-I-add-browser-tp3948920p3948920.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> 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.
>
-- 
Patrick Burns
pburns at pburns.seanet.com
twitter: @portfolioprobe
http://www.portfolioprobe.com/blog
http://www.burns-stat.com
(home of 'Some hints for the R beginner'
and 'The R Inferno')