Dear Zack, Thank you for giving me this information. I am not sure how to fix this with windows. a
------------------ "Namaste नमसà¥à¤¤à¥" Aseem Sharma Graduate Research Assistant Northern Hydrometeorology Group(NHG) Natural Resources and Environmental Studies Institute(NRESi) University of Northern British Columbia Prince George, BC, V2N 4Z9, Canada Tel: 250-960-5427 Web: http://www.unbc.ca/ "All know the Way, but few actually walk it." "सबà¥à¤à¥ à¤à¤²à¥à¤¯à¤¾à¤£ हà¥à¤¸à¥ ।" On Tue, Mar 11, 2014 at 9:48 AM, Zack Holden <[email protected]> wrote: > Hi Aseem, > I ran into this problem some time ago and posted my solution to the > r-sig-geo list. This was on a Linux server. I'm not sure what the default > upper file limit is on windows, but this may give you some clues. Also, I > saw several other posts and responses with the same problem, I've pasted a > link to one of those threads below. > > HTH, > > Zack > > # my solution > > http://r-sig-geo.2731867.n2.nabble.com/solved-raster-ncdf4-error-too-many-open-files-td7583723.html > > # a similar post > > http://r-sig-geo.2731867.n2.nabble.com/raster-rgdal-problem-Too-many-open-files-Linux-td7584338.html > > > On Tue, Mar 11, 2014 at 10:27 AM, Aseem Sharma <[email protected]>wrote: > >> hi, >> i have big netCDF file that archive daily climate data since 1950-01-01 to >> 2010-12-31. I want to extract this CDF file so that new will have same >> data >> only starting from 1980-01-01 ( i e recent 30 years only). >> I tried with subset function of raster package. after overnight running, >> it gives me error of too many files. >> >> So how can i extract only recent years netCDF. >> >> My code so far: >> subset(data,10592:22280, drop=TRUE,filename="data_19800101_20101231.nc >> ",overwrite=TRUE) >> >> where >> data is my netCDF with data from 1950-01-01 and 10592:22280 is the no of >> days between 1980-01-01 to 2010-12-31. >> >> Error ( after more than 12 hours running ) >> >> Error in R_nc_open: Too many open files >> Error in open.ncdf(x@file@name) : >> Error in open.ncdf trying to open file Z:\Thesis\Data\CCC >> Data\Tmn_19500101_20101231.nc >> >> Traceback after error >> > traceback() >> 13: stop(paste("Error in open.ncdf trying to open file", con)) >> 12: open.ncdf(x@file@name) >> 11: .openConnection(x, ...) >> 10: readStart(x@layers[[i]], con.check = 103, ...) >> 9: readStart(x@layers[[i]], con.check = 103, ...) >> 8: readStart(x, ...) >> 7: readStart(x, ...) >> 6: .local(x, filename, ...) >> 5: writeRaster(x, filename, ...) >> 4: writeRaster(x, filename, ...) >> 3: .local(x, ...) >> 2: subset(Tmin, 10592:22280, drop = TRUE, filename = >> "Tmn_19800101_20101231.nc", >> overwrite = TRUE) >> >> Session info >> > sessionInfo() >> R version 3.0.2 (2013-09-25) >> Platform: x86_64-w64-mingw32/x64 (64-bit) >> >> locale: >> [1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United >> States.1252 >> [3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C >> >> [5] LC_TIME=English_United States.1252 >> >> attached base packages: >> [1] grid stats graphics grDevices utils datasets methods >> base >> >> other attached packages: >> [1] zyp_0.10-1 Kendall_2.2 scales_0.2.3 plyr_1.8 >> ggplot2_0.9.3.1 >> [6] reshape2_1.2.2 zoo_1.7-10 rasterVis_0.27 >> hexbin_1.26.3 latticeExtra_0.6-26 >> [11] RColorBrewer_1.0-5 lattice_0.20-23 ncdf_1.6.6 >> raster_2.2-12 sp_1.0-14 >> >> loaded via a namespace (and not attached): >> [1] boot_1.3-9 colorspace_1.2-4 dichromat_2.0-0 digest_0.6.4 >> gtable_0.1.2 >> [6] labeling_0.2 MASS_7.3-29 munsell_0.4.2 proto_0.3-10 >> stringr_0.6.2 >> [11] tools_3.0.2 >> > >> I couldn't attache the exact data. One smaller version of same data is >> here<https://www.dropbox.com/s/yx9q09iek593f81/obs1.nc> >> . >> >> Thank you, >> a >> >> ---- >> >> [[alternative HTML version deleted]] >> >> _______________________________________________ >> R-sig-Geo mailing list >> [email protected] >> https://stat.ethz.ch/mailman/listinfo/r-sig-geo >> > > [[alternative HTML version deleted]]
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