Interface to 'NetCDF' Datasets
An interface to the 'NetCDF' file formats designed by Unidata
for efficient storage of array-oriented scientific data and descriptions.
Most capabilities of 'NetCDF' version 4 are supported. Optional conversions
of time units are enabled by 'UDUNITS' version 2, also from Unidata.
RNetCDF provides an R interface to the NetCDF file format designed by Unidata
for efficient storage of array-oriented scientific data and descriptions.
This R interface is closely based on the C API of the NetCDF library,
and it includes calendar conversions from the Unidata UDUNITS library.
The current implementation supports operations on NetCDF datasets
in classic, 64-bit offset and netcdf4-classic file formats.
Work is progressing to add full support for netcdf4.
An introduction to the RNetCDF package is given in http://journal.r-project.org/archive/2013-2/michna-woods.pdf .
News
Version 1.9-1, 2017-10-04
- Allow multiple NA values in count argument of var.get.nc/var.put.nc,
so that corresponding dimensions are read/written to their defined length.
- Fix support for OPeNDAP (if enabled by the netcdf library)
- Build Windows packages with netcdf4 library
- Register C routines for efficient access by R
Version 1.8-2, 2016-02-21
- Add support for POSIXct timestamps to utcal.nc and utinvcal.nc.
- Use nc-config by default in configure to find netcdf build settings.
- Allow customisation of configure by variables CPPFLAGS, LDFLAGS and LIBS,
and remove the following options: --with-netcdf-include, --with-netcdf-lib,
--with-hdf5-lib, --with-udunits-include, --with-udunits-lib.
Version 1.7-3, 2015-05-09
- Support reading/writing NC_CHAR as vectors of raw bytes
- Avoid intermediate copies of array data when possible
- Fix memory errors reported by valgrind for udunits2 calendar functions.
- Support compilation with udunits.h inside a udunits2 sub-directory.
- Add udunits data files to source package to ensure they can be found
when building binary packages for Windows and Mac.
Version 1.6.3-1, 2014-09-01
- Allow reading of character vector or scalar
Version 1.6.2-3, 2014-06-16
- Added HDF5 licence file for distribution
Version 1.6.2-2, 2014-05-27
- Corrected potential memory leak in read/write of character arrays
Version 1.6.1-2, 2012-07-20
- Added function read.nc
- Added packing/unpacking of data
Version 1.5.3-1, 2012-02-15
- Optionally copy udunits data files during installation of RNetCDF.
- When loading RNetCDF in R, initialise udunits with copied data files.
Version 1.5.2-2, 2011-01-06
- configure adds tests for extra libraries used by netcdf4 on some systems.
- Avoid repeated zeroing of character arrays in C interface.
Version 1.5.0-1, 2010-12-30
- Add new modes (large, prefill, share) to nc_open and nc_create.
- Avoid unnecessary switching of define and data modes in C library
to prevent unwanted data movement within a file.
- configure script accepts optional path for hdf5 (for netcdf4 library).
- Added basic functional tests of package.
Version 1.2-1.1, 2010-05-11
- Add build scripts for Windows.
Version 1.2-1, 2006-07-26
- utcal.nc and utinvcal.nc optionally handle dates in string form.
- configure script accepts optional paths for netcdf and udunits.
Version 1.1-3, 2005-03-21
- Minor bugfix for detection of udunits headers in configure script.
Version 1.1-2, 2005-01-04
- Return proper error status in C functions R_nc_sync and R_nc_get_vara_text.
Version 1.1-1, 2004-09-19
- Add option to collapse singleton dimensions when reading arrays.
- Allow reading of arrays without conversion of missing values.
Version 1.0-4, 2004-09-11
- Search extra directories during configure.
Version 1.0-3, 2004-08-01
- First release based on netcdf package by Thomas Lumley
and ncdf package by David Pierce.