[R] R and hdf

Thomas Lumley thomas at biostat.washington.edu
Fri Nov 20 20:10:16 CET 1998

On Fri, 20 Nov 1998 bacon at aerodyne.com wrote:

> Hi,
> I've been playing with R for only a few days, so I'm not terribly
> familiar with it yet.  Has anyone ever done any work using HDF or
> NetCDF files with R?

Yes.  Steve Oncley <oncley at ucar.edu> wrote back in May

  You may be interested that almost all of the data we read into S+ is
  NetCDF. This has involved writing a bit of C code to link to the Unidata
  C library, which we load into S and are then called with .C().  I have
  enclosed the comments from our core S+ routine below.  Calls to this
  routine handle opening multiple files and assigning S+ attributes such 
  as time and units-of-measure (read from the NetCDF attributes).

  All of our code is available upon request (simply because I'm not sure
  that it is in shape yet for public distribution).  I plan to convert all
  of it to R as part of configuring a new laptop next month :)

More recently we have received some HDF support code (I've lost the
message, but I would expect it has been archived). It wasn't included in
R0.63 because it used a lot of gcc-specific features that would break in
standard C compilers.

Thomas Lumley
Assistant Professor, Biostatistics
University of Washington, Seattle

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