[R] How do I temporarily stop an execution?

[Prof Brian Ripley]

On Tue, 19 Jun 2001, Jonathan Baron wrote:

> If you _know_ in advance that you want to stop at some
> point, readline(), is useful.  It is how the demo program
> works.  The function stop() is good too, for debugging,
> but you can't restart.  Jon

I think I did not understand the aim here, and after I private reply can
suggest:

1) par(ask=T)  stops before each graph.

2) package sm has a simple pause() function using readline that can be
useful:

pause <- function ()
{
    cat("Pause. Press <Enter> to continue...")
    readline()
    invisible()
}

3) Inserting a call to browser() is even better for debugging.

BDR

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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