R help - Jun 2012 - do.call(), browser() and large arguments

Hi R users,


i use do.call() to run some functions on large datasets. For debugging 
purposes I occasionally use browser. In the case of large datasets 
supplied to do.call, this however results in R printing huge amounts of 
numbers on the screen. Is there any way to reduce this output?

I found a similar discussion here:

http://tolstoy.newcastle.edu.au/R/help/06/02/21727.html

but it stopped before giving me any hint on how to solve the problem or 
whether there is a solution at all.

Any ideas?

Thanks
Jannis

On 12-06-08 7:06 AM, Jannis wrote:
> Hi R users,
>
>
> i use do.call() to run some functions on large datasets. For debugging
> purposes I occasionally use browser. In the case of large datasets
> supplied to do.call, this however results in R printing huge amounts of
> numbers on the screen. Is there any way to reduce this output?
>
> I found a similar discussion here:
>
> http://tolstoy.newcastle.edu.au/R/help/06/02/21727.html
>
> but it stopped before giving me any hint on how to solve the problem or
> whether there is a solution at all.
>
> Any ideas?
>
browser() prints the call on entry.  do.call() constructs a call 
containing the values, so you see that, unless you ask browser() not to 
report the call, using its skipCalls argument.

This is documented in ?browser.

Duncan Murdoch