[R] Show Progress in loop

[Peter Dalgaard]

"Rainer M. Krug" <RKrug at sun.ac.za> writes:

> I put print(i) in the loop instead of i, but it still only prints (in 
> the Windows R GUI) i after it finished the calculations.
> I guess it might be due to the output buffering you mentioned - but how 
> do I unset it?

Using the user friendly interface... (it's on one of the top menus),
or, as Uwe suggested, stick in flush.console() after the print(i).

        -p
 
> Rainer
> 
> Peter Dalgaard wrote:
> > "Rainer M. Krug" <RKrug at sun.ac.za> writes:
> > 
> > 
> >>Hi
> >>
> >>I have a loop which is doing time consuming calculations and I would 
> >>like to be able to have some feedback on where it is in it's 
> >>calculations. I tried to simply show the counter variable in the loop, 
> >>but id doesn't work as all display seems to be delayed until the loop is 
> >>completed. Is there any way of displaying the progress of a loop?
> >>
> >>Rainer
> >>
> >>The loop:
> >>
> >>for (i in 2:Result$NoSims)
> >>{
> >>	ppp <- runifpoint(Result$NoPlants)
> >>	K <- Kest(ppp)
> >>	Result$LSim[i,] <- sqrt(K$iso / pi) - K$r
> >>	CM <- (Result$LSim[i,] * Result$LSim[i,]) / abs(K$r[2] - K$r[1])
> >>	Result$SigCM[i] <- sum(CM, na.rm=TRUE)
> >>	i  #<========================Doesn't display in the loop
> >>}
> > 
> > 
> > Just print(i) and if on Windows, remember to unset output buffering. 
> > 
> 
> 
> 
> -- 
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> Rainer M. Krug, Dipl. Phys. (Germany), MSc Conservation
> Biology (UCT)
> 
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> 
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