[R] RE : Re: Progress in a loop

From: Florent Bresson <f_bresson_at_yahoo.fr>
Date: Thu 20 Jul 2006 - 01:16:47 EST


Thanks, it is exactly what I was looking for.

Florent Bresson

> On Wed, 2006-07-19 at 16:12 +0200, Florent Bresson
> wrote:
> > Hi, I have to use a loop to perform a quite
> computer
> > intensive estimation and I would like to know the
> > progress of the loop during the process. I tried
> to
> > include something like
> >
> > print(paste(k,date(),sep=" : "))
> >
> > where k is the number of the iteration, but the
> result
> > appears only at the end of the loop. Can someone
> help
> > me please ?
>
> Windows I assume - you are asked to provide some
> rudimentary information
> about your system when asking for help as the
> posting guide states.
>
> You need to use flush.console() on Windows, as in:
>
> dat <- matrix(runif(20), ncol = 2)
> res <- numeric(length = 10)
> for(i in 1:10) {
> res[i] <- sum(dat[i, ])
> cat(paste("Iteration #:", i, "-", date(), "\n"))
> flush.console()
> }
>
> Depending on how you want the printed statements to
> appear on the
> screen, you'd be better off with cat not print,
> e.g.:
>
> cat(paste(k,date(),sep=" : "))
>
> If this isn't the solution, post a reply containing
> information about
> your R version, OS, and a reproducible example
> (simple code & data as I
> did) to show us the problem.
>
> HTH
>
> G
> --
>
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> Gavin Simpson [t] +44 (0)20 7679
> 0522
> ECRC & ENSIS, UCL Geography, [f] +44 (0)20 7679
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