I think you get the error because you passed the object from nc_open(), you should rather pass the filename of the netCDF, so:
pre = brick("sample_precip_daily.nc") From the test-file, this gives you a RasterBrick-object with 5*9 pixels and 7305 layers. Then you can extract data.frames of each layer with: dframe = rasterToPoints(pre[[1]]) where 1 is the first layer, or time series with: tseries = pre[3,4] where 3 and 4 are the pixels in x and y-direction. To write dframe to csv: write.csv(dframe, filename = "csvfile.csv") Check the function for more options. Hope this helps you a bit further. Jon On 7/26/2016 9:07 PM, lily li wrote: > Thanks for your reply. But it says "Error in (function (classes, fdef, > mtable)): > unable to find an inherited method for function 'brick' for signature > 'ncdf4' " > > The dataset is attached. It contains daily precipitation data for 20 > years, within a rectangle, so that there are several grid points. I > use the code to open it, but don't know how to get csv files, while > each file contains continuous daily precipitation data for each grid cell. > pre1 = nc_open('sample_precip_daily.nc <http://sample_precip_daily.nc>') > pre1 > pre1_rd = ncvar_get(pre1, 'precipitation') > nc_close(pre1) > > Thanks for your help. > > On Tue, Jul 26, 2016 at 4:08 AM, Jon Skoien > <jon.sko...@jrc.ec.europa.eu <mailto:jon.sko...@jrc.ec.europa.eu>> wrote: > > You could try with the brick function from the raster package. > > bvar = brick(netcdfName) > > This uses the ncdf4 functions for opening and reading the netcdf, > but makes it easier to extract data for each day: > > p1 = rasterToPoints(bvar[[1]]) > and write p1 to csv. > > Best, > Jon > > > > On 7/26/2016 6:54 AM, lily li wrote: > > Hi all, > > I have a problem in opening netcdf files. If one netcdf file > contains > longitude, latitude, and daily precipitation. How to relate each > precipitation record to its associated location, and export > them as csv > files? Thanks. > > I just use nc_open(), ncvar_get(), but it is not very helpful. > Thanks for > any ideas. > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org <mailto:R-help@r-project.org> mailing > list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > > -- > Jon Olav Skøien > Joint Research Centre - European Commission > Institute for Space, Security & Migration > Disaster Risk Management Unit > > Via E. Fermi 2749, TP 122, I-21027 Ispra (VA), ITALY > > jon.sko...@jrc.ec.europa.eu <mailto:jon.sko...@jrc.ec.europa.eu> > Tel: +39 0332 789205 <tel:%2B39%200332%20789205> > > Disclaimer: Views expressed in this email are those of the > individual and do not necessarily represent official views of the > European Commission. > > -- Jon Olav Skøien Joint Research Centre - European Commission Institute for Space, Security & Migration Disaster Risk Management Unit Via E. Fermi 2749, TP 122, I-21027 Ispra (VA), ITALY jon.sko...@jrc.ec.europa.eu Tel: +39 0332 789205 Disclaimer: Views expressed in this email are those of the individual and do not necessarily represent official views of the European Commission. [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.