R help - Jun 2009 - Preventing .Call from printing a blank line to the R console on Windows

Hello everyone,

I am using the CVODES integrator in the Rsundials package.  Every time
I call the integrator, a blank line is printed in the console.  Using
debug, I was able to isolate the problem to this line in the function
cvodes(...):

solutions = .Call("cvodes", PACKAGE = "Rsundials",
as.double(y), ...

Since I am running the integrator thousands of times, I wind up with
thousands of blank lines.  This makes it hard to print out periodic
updates from a for loop; they are lost among all the blank lines!

Is it somehow possible to stop this .Call command from printing a
blank line?

Thank you for your help.

On 10/06/2009 5:16 PM, Joel wrote:
> Hello everyone,
> 
> I am using the CVODES integrator in the Rsundials package.  Every time
> I call the integrator, a blank line is printed in the console.  Using
> debug, I was able to isolate the problem to this line in the function
> cvodes(...):
> 
> solutions = .Call("cvodes", PACKAGE = "Rsundials",
as.double(y), ...
> 
> Since I am running the integrator thousands of times, I wind up with
> thousands of blank lines.  This makes it hard to print out periodic
> updates from a for loop; they are lost among all the blank lines!
> 
> Is it somehow possible to stop this .Call command from printing a
> blank line?
The best way is to fix the package so it doesn't do that, but a 
workaround using capture.output() or sink() is probably possible.

Duncan Murdoch