[R] Q: how to interrupt long calculation?

[D. R. Evans]

Prof Brian Ripley said the following at 08/30/2007 11:00 AM :
> On Thu, 30 Aug 2007, D. R. Evans wrote:
> 
>> Paul Smith said the following at 08/29/2007 04:32 PM :
>>
>>> The instance of R running will be immediately killed and then you can
>>> start R again.
>> But then I would lose all the work. There must be some way to merely
>> interrupt the current calculation. Mustn't there?
> 
> Only if it is long-running in R code, when ctrl-C or equivalent (Esc in 
> Rgui) works. If it is long-running in C or Fortran code, there is not.
> 

It's inside loess()... so isn't that R code?

I can sit hitting ctrl-C all day (well, it seems like it), but the code
does not get interrupted :-(

> Assuming a Unix-alike, sending SIGUSR1 will save the current workspace and 
> quit.  Even that is a little dangerous as the workspace need not be in a 
> consistent state.
> 

That's helpful, thank you; at least it means I stand a chance of being able
to interrupt the code and recover.