[R] Stderr

[Uwe Ligges]

Patricia García wrote:
> Hi,
> 
> sorry for the last sentence, i was trying to make a generic statement by
> writing "function"
> So the code has to be:
> 
> # Save error mesage:
>    error1  <-  file("error1.txt", open="wt")
>    sink(error1, type="message")
>    experiment <- somefunction(data)
> 
> (I mean  no matter what function is...)


So you want to implement error handling for function somefunction()?


> error1 is not a variable, y can't watch what contains, it is only the
> definition of a file....

No, error1 is an *object* that contains information about the opened 
connection to the file.


> What i wanted was in fact to create a variable with the error message, I can
> do it of course by reading the file, but my question is about doing it
> directly.

As I already said in my former mail, error handling is available, please 
read ?try.

Uwe Ligges





> Thanks
> 
> 
> 
> 2008/4/10, Uwe Ligges <ligges at statistik.tu-dortmund.de>:
>>
>>
>> Patricia García wrote:
>>
>>> Hi everyone,
>>>
>>> I need to get an error message as an object in the std output console. I
>>> can
>>> get it as a file with the following instructions:
>>>
>>> # Save error mesage:
>>>    error1  <-  file("error1.txt", open="wt")
>>>    sink(error1, type="message")
>>>    experiment <- function(data)
>>>
>>>
>>> With this, the error messages get saved in the file, but i need them as
>>> object in order to work with it in the console.
>>>
>>
>> I'm not sure what you are going to do, note that the last line contains an
>> incomplete statement...
>>
>> If you want an object: you already have got the object error1 ...
>>
>> If you want error handling facilities, see ?try and its "See Also"
>> section.
>>
>>
>> Uwe Ligges
>>
>>
>>  Is it possible?
>>> Thanks
>>>
>>>
>>>
>>>
>>> ------------------------------------------------------------------------
>>>
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>>> PLEASE do read the posting guide
>>> http://www.R-project.org/posting-guide.html
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>>>
> 
>