Marie, It seems you are manipulating large amounts of data in RAM with 32-bit R --- use 64 bit if you can. As Jacob indicated, you can use options like rasterOptions(maxmemory=1e+07, chunksize=1e+06). However, you might also have been able to avoid memory problems by using the more direct
b1 <- writeRaster(s1, filename="b1", overwrite=TRUE) instead of: b1 <- brick(s1, filename="b1", overwrite=TRUE) It would probably also be better to do: b0 <- writeRaster(b0, filename="b0",overwrite=TRUE) (values of b0 now on disk) instead of writeRaster(b0, filename="b0",overwrite=TRUE) (R object b0 did not change; all values still in RAM) Best, Robert On Wed, Dec 12, 2012 at 1:14 PM, Marie Auger-Methe < marie.augerme...@gmail.com> wrote: > Thanks for the replies. > > changing the raster options as suggested by Jacob fixed the problem. I > lowered the maxmemory: > rasterOptions(maxmemory=**90000000) > rather than changing the todisk option. It worked like a charm. > > Thanks! > > Marie > > > > > On 12/12/2012 8:24 PM, Jacob van Etten wrote: > >> Take a look at setOptions to force disk to disk. >> >> raster will guess if it can do the operation in memory but occasionally >> underestimates the memory available or required. >> >> Sent from my iPhone >> >> On 12/12/2012, at 15:20, Raffaele Morelli <raffaele.more...@gmail.com> >> wrote: >> >> 2012/12/12 Marie Auger-Methe <marie.augerme...@gmail.com> >>> >>> Dear list, >>>> >>>> I am using large raster bricks for my analyses and I am running out of >>>> memory. I get the following message: >>>> >>>> Error: cannot allocate vector of size 231.0 Mb >>>> >>>> and this whether I do all my brick manipulations by loading the brick in >>>> R's memory or not (i.e., whether I use the option filename="name of my >>>> file"). >>>> The strangest characteristic of the problem I have is that I get an >>>> error message when I handle smaller brick and not when handle larger >>>> brick. >>>> >>>> I have clean up my computer, defragmented it, increase my virtual >>>> memory, etc, and I still get an error. >>>> >>>> Any help will be greatly appreciated, >>>> >>>> Marie >>>> >>> >>> Welcome to the band called "Three of us (can't handle such big rasters)" >>> ;-) >>> >>> -raffaele >>> >>> [[alternative HTML version deleted]] >>> >>> ______________________________**_________________ >>> R-sig-Geo mailing list >>> R-sig-Geo@r-project.org >>> https://stat.ethz.ch/mailman/**listinfo/r-sig-geo<https://stat.ethz.ch/mailman/listinfo/r-sig-geo> >>> >> ______________________________**_________________ >> R-sig-Geo mailing list >> R-sig-Geo@r-project.org >> https://stat.ethz.ch/mailman/**listinfo/r-sig-geo<https://stat.ethz.ch/mailman/listinfo/r-sig-geo> >> > > ______________________________**_________________ > R-sig-Geo mailing list > R-sig-Geo@r-project.org > https://stat.ethz.ch/mailman/**listinfo/r-sig-geo<https://stat.ethz.ch/mailman/listinfo/r-sig-geo> > [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
