![]() ![]() To retrieve data from dataset, use ncvar_get(). Short TotalCounts_A (Contiguous storage)įloat SurfPres_Forecast_A (Contiguous storage) To open a NASA HDF file, use nc_open() call with path to the file name.įile AIRS.2003.02.05.元.RetStd_H001.v6.0.12.0.G14112124328.hdf (NC_FORMAT_NETCDF4):ħ70 variables (excluding dimension variables): To use ncdf4, the first step is to include the package. We provide a complete sample R code example and plot on GitHub. Thus, make sure that your HDF5 library is built with -enable-cxx configuration option. hdf5r package is based on HDF5 C++ bindings. On Unix systems, hdf5r package may be installed from source after compilation. >install.packages('rgdal', type='source')Īt the R prompt, run the following command to install binary package. Once you installed the GEE, build and install rgdal from source package by issuing the following command at the R prompt. Please read carefully how to build GDAL with HDF4 support. To maximize the usability of NASA HDF products, we recommend you to use a special GDAL library called GEE from NASA. Then, build the package again and install it. # -lnetcdf -ljpeg -lmfhdf -ldf -lhdf5_hl -lhdf5 -ldl -lm -lz -lcurl In /Library/Frameworks/R.framework/Versions/3.3/Resources/library/ncdf4/libs/ncdf4.soįor such case, please decompress the ncdf4 R package source and edit PKG_LIBS line in ncdf4/src/Makevars.in as follows. Referenced from: /Library/Frameworks/R.framework/Versions/3.3/Resources/library/ncdf4/libs/ncdf4.so Unable to load shared object '/Library/Frameworks/R.framework/Versions/3.3/Resources/library/ncdf4/libs/ncdf4.so':ĭlopen(/Library/Frameworks/R.framework/Versions/3.3/Resources/library/ncdf4/libs/ncdf4.so, 6): Symbol not found: _nc_close ** testing if installed package can be loadedĮrror in dyn.load(file, DLLpath = DLLpath. ![]() The above command may not work on Mac OS X with the following error message. >install.packages("ncdf4_1.20.tar.gz", repos = NULL, type="source") Once netCDF library that can support HDF4 is installed, you can build ncdf4 R package from source. $export LDFLAGS='-L/usr/local/lib -ljpeg' If -enable-hdf4 configuration option fails when you configure netCDF-C library, try to set the following environment variable options assuming that both HDF4 and JPEG libraries are installed under /usr/local. In such case, you can build netCDF library with -enable-hdf4 configuration from source and build ncdf4 R package from source. The default installation of ncdf4 doesn't support reading HDF4īecause netCDF library is not built with HDF4 support.įor example, if you open an HDF4 file, you will get the following error message.Įrror in R_nc4_open: NetCDF: Attempt to use feature that was not turned on when netCDF was built. Thus, we provide a complete GitHub Action workflow file. Installing a custom netCDF with HDF4 support is not simple. The default installation of RNetCDF doesn't support reading HDF4.įor example, if you install R using apt-get install r-base, Rgdal and hdf5r package will work without source customization so you don't have to download R source packages. You will need the following ncdf4 R source package to build with the custom libraries that enhance the access of NASA HDF products.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |