On 02/10/2014 16:40, Alexsandro Cândido de Oliveira Silva wrote:
I have a list (temp.data) with many raster data and some computations are in
parallel. n is the number of raster data and target is the mask. I'd like to
use a progress bar. It is created but while the loop is running the progress
is not showed. The loop ends and the progress bar is closed. I've tried to
use the functions pdCreate/pdStep in raster package, but without success...
Someone have any idea...
You are using parallel processes here. You do not tell us what packages
you are actually using, but my guess is that
setTkProgressBar(mypb, i, title = "R progress bar", label = NULL)
updates a copy of mypb in the worker process, but it is the master
process which is displaying the progress bar.
But without the complete reproducible example the posting guide asked
for, we can only guess.
mypb <- tkProgressBar(title = "R progress bar", label = "", min = 0,
max = n, initial = 0, width = 300)
#creating a computing cluster
cl <- makeCluster(detectCores(),type='SOCK')
registerDoParallel(cl, cores = detectCores())
foreach(i=1:n,.packages=c('tcltk','rgdal','raster')) %dopar% {
Sys.sleep(.1)
setTkProgressBar(mypb, i, title = "R progress bar", label = NULL)
temp.data[[i]]<-mask(temp.data[[i]],target,maskvalue=as.numeric(class.outsid
e))
writeRaster(temp.data[[i]],filename=files.list[i],format='GTiff',overwrite=T
)
}
stopCluster(cl)
close(mypb)
Thanks
Alexsandro
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Brian D. Ripley, rip...@stats.ox.ac.uk
Emeritus Professor of Applied Statistics, University of Oxford
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and provide commented, minimal, self-contained, reproducible code.
