Hi Roy, Thanks for your help. It works perfectly. if I am trying to read multiple files similar ways, how do I do that? with regards -Deb
On Fri, Sep 30, 2016 at 5:53 PM, Roy Mendelssohn - NOAA Federal < roy.mendelss...@noaa.gov> wrote: > Hi Deb: > > > > gribfile <- 'http://thredds.ucar.edu/thredds/ncss/grib/NCEP/GFS/ > Global_0p5deg/best?north=47.0126&west=-114.841&east=-112. > 641&south=44.8534&time_start=present&time_duration=PT3H& > accept=netcdf&var=v-component_of_wind_height_above_ground,u- > component_of_wind_height_above_ground' > > > download.file(gribfile,'junk.nc',mode = "wb") > > trying URL 'http://thredds.ucar.edu/thredds/ncss/grib/NCEP/GFS/ > Global_0p5deg/best?north=47.0126&west=-114.841&east=-112. > 641&south=44.8534&time_start=present&time_duration=PT3H& > accept=netcdf&var=v-component_of_wind_height_above_ground,u- > component_of_wind_height_above_ground' > > Content type 'application/x-netcdf' length unknown > > .... > > downloaded 4360 bytes > > > > > library(ncdf4) > > > junkFile <- nc_open('junk.nc') > > > str(junkFile) > > List of 14 > > $ filename : chr "junk.nc" > > $ writable : logi FALSE > > $ id : int 65536 > > $ safemode : logi FALSE > > $ format : chr "NC_FORMAT_CLASSIC" > > $ is_GMT : logi FALSE > > $ groups :List of 1 > > ..$ :List of 7 > > .. ..$ id : int 65536 > > .. ..$ name : chr "" > > .. ..$ ndims: int 4 > > .. ..$ nvars: int 7 > > .. ..$ natts: int 13 > > .. ..$ dimid: int [1:4(1d)] 0 1 2 3 > > .. ..$ fqgn : chr "" > > .. ..- attr(*, "class")= chr "ncgroup4" > > $ fqgn2Rindex:List of 1 > > ..$ : int 1 > > $ ndims : num 4 > > $ natts : num 13 > > $ dim :List of 4 > > > > <snip> > > I cut off the rest as that is not important for your question. > > HTH, > > -Roy > > > On Sep 30, 2016, at 4:21 PM, Debasish Pai Mazumder <pai1...@gmail.com> > wrote: > > > > Hi > > Now I am using netcdfSubset and I am able to download the file but not > sure how to read the files. here my scripts > > library("ncdf4") > > > > gribfile<-"http://thredds.ucar.edu/thredds/ncss/grib/ > NCEP/GFS/Pacific_40km/best/dataset.html" > > download.file(gribfile,basename(gribfile),mode = "wb") > > x<-nc_open(gribfile) > > > > gribfile<-"http://thredds.ucar.edu/thredds/ncss/grib/ > NCEP/GFS/Global_0p5deg/best?north=47.0126&west=-114.841& > east=-112.641&south=44.8534&time_start=present&time_ > duration=PT3H&accept=netcdf&var=v-component_of_wind_height_above_ground,u- > component_of_wind_height_above_ground" > > download.file(gribfile,basename(gribfile),mode = "wb") > > x<-nc_open(gribfile) > > > > > > nc_open doesn't work. > > > > which command should I use? > > > > with regards > > -Deb > > > > > > On Tue, Sep 27, 2016 at 9:30 PM, Michael Sumner <mdsum...@gmail.com> > wrote: > > Opendap won't work on Windows CRAN build of ncdf4, though the rgdal > build does work directly on grib. > > > > Summary: download the files wholus for use on Windows, or set your own > system on Linux. > > > > Building ncdf4 on Windows is not too hard if you know about doing that. > > > > Cheers, Mike > > > > On Wed, 28 Sep 2016, 06:49 Roy Mendelssohn - NOAA Federal < > roy.mendelss...@noaa.gov> wrote: > > Please post the code of what you tried, as I have no idea otherwise what > did or did not work for you. > > > > -Roy > > > > > On Sep 27, 2016, at 12:44 PM, Debasish Pai Mazumder <pai1...@gmail.com> > wrote: > > > > > > Hi Roy, > > > Thanks for your response. I have tried according your suggestion but > it doesn't work. > > > the OPeNDAP link of the data > > > http://nomads.ncdc.noaa.gov/thredds/dodsC/modeldata/cfsv2_ > forecast_ts_9mon/2014/201404/20140403/2014040312/ > > > > > > datafile: > > > tmax.01.2014040312.daily.grb2 > > > > > > Thanks > > > -Deb > > > > > > On Tue, Sep 27, 2016 at 11:51 AM, Roy Mendelssohn - NOAA Federal < > roy.mendelss...@noaa.gov> wrote: > > > Look at the package ncdf4. You can use an OPeNDAP URL in place of the > file name to perform subsets., > > > > > > -Roy > > > > > > > On Sep 27, 2016, at 9:06 AM, Debasish Pai Mazumder < > pai1...@gmail.com> wrote: > > > > > > > > Hi all, > > > > > > > > I would like to access and subset following OpeNDAP files. > > > > server: > > > > http://nomads.ncdc.noaa.gov/thredds/dodsC/modeldata/cfsv2_ > forecast_ts_9mon/2014/201404/20140403/2014040312/ > > > > > > > > file name: tmax.01.2014040312.daily.grb2 > > > > <http://nomads.ncdc.noaa.gov/thredds/dodsC/modeldata/cfsv2_ > forecast_ts_9mon/2014/201404/20140403/2014040312/catalog. > html?dataset=modeldata/cfsv2_forecast_ts_9mon/2014/201404/ > 20140403/2014040312/tmax.01.2014040312.daily.grb2> > > > > I would like to access and subset the file. Any help will be > appreciated. > > > > > > > > with regards > > > > -Deb > > > > > > > > [[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. > > > > > > ********************** > > > "The contents of this message do not reflect any position of the U.S. > Government or NOAA." > > > ********************** > > > Roy Mendelssohn > > > Supervisory Operations Research Analyst > > > NOAA/NMFS > > > Environmental Research Division > > > Southwest Fisheries Science Center > > > ***Note new address and phone*** > > > 110 Shaffer Road > > > Santa Cruz, CA 95060 > > > Phone: (831)-420-3666 > > > Fax: (831) 420-3980 > > > e-mail: roy.mendelss...@noaa.gov www: http://www.pfeg.noaa.gov/ > > > > > > "Old age and treachery will overcome youth and skill." > > > "From those who have been given much, much will be expected" > > > "the arc of the moral universe is long, but it bends toward justice" > -MLK Jr. > > > > > > > > > > ********************** > > "The contents of this message do not reflect any position of the U.S. > Government or NOAA." > > ********************** > > Roy Mendelssohn > > Supervisory Operations Research Analyst > > NOAA/NMFS > > Environmental Research Division > > Southwest Fisheries Science Center > > ***Note new address and phone*** > > 110 Shaffer Road > > Santa Cruz, CA 95060 > > Phone: (831)-420-3666 > > Fax: (831) 420-3980 > > e-mail: roy.mendelss...@noaa.gov www: http://www.pfeg.noaa.gov/ > > > > "Old age and treachery will overcome youth and skill." > > "From those who have been given much, much will be expected" > > "the arc of the moral universe is long, but it bends toward justice" > -MLK Jr. > > > > ______________________________________________ > > 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. > > -- > > Dr. Michael Sumner > > Software and Database Engineer > > Australian Antarctic Division > > 203 Channel Highway > > Kingston Tasmania 7050 Australia > > > > > > ********************** > "The contents of this message do not reflect any position of the U.S. > Government or NOAA." > ********************** > Roy Mendelssohn > Supervisory Operations Research Analyst > NOAA/NMFS > Environmental Research Division > Southwest Fisheries Science Center > ***Note new address and phone*** > 110 Shaffer Road > Santa Cruz, CA 95060 > Phone: (831)-420-3666 > Fax: (831) 420-3980 > e-mail: roy.mendelss...@noaa.gov www: http://www.pfeg.noaa.gov/ > > "Old age and treachery will overcome youth and skill." > "From those who have been given much, much will be expected" > "the arc of the moral universe is long, but it bends toward justice" -MLK > Jr. > > [[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.
