[R] task percentage completion

Prof Brian Ripley ripley at stats.ox.ac.uk
Tue Apr 30 11:51:29 CEST 2013

On 30/04/2013 10:40, Fabio Berzaghi wrote:
> Dear All,
> Is it possible to add a percentage completion bar to R? I find it
> frustrating when running long calculations that I don't know at what
> point the process is. It would be very helpful so I am not guessing if I
> should wait a few minutes or hours.

Yes.  See ??progressbar

And this does need some knowledge from the programmer: no way can anyone 
know how long a task will take without either

- a pretty complete (and correct) analysis
- trying it.

People inadvertently write loops where step i takes time proportional to 
i, so extrapolation from a pilot study does not suffice.

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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 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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