Re: [OctDev] new package ncArray 1.0.0

[Michael G. <mic...@gm...>]

On Wed, Jul 18, 2012 at 12:44 PM, Alexander Barth <bar...@gm...
> wrote:

> Sorry for poor spelling in my last email. The email was sent
> inadvertently before I could check it.
> Source packages are here:
>
>
> http://modb.oce.ulg.ac.be/mediawiki/upload/Alex/ncArray/ncarray-1.0.0.tar.gz
> http://modb.oce.ulg.ac.be/mediawiki/upload/Alex/ncArray/ncarray-html.tar.gz
>
> Can somebody update the server?
> Best regards,
> Alex
>
>
> On Wed, Jul 18, 2012 at 1:30 PM, Alexander Barth
> <bar...@gm...> wrote:
> > Dear all,
> >
> > I have released a new package called ncArray for manipulating netcdf
> > files. It depends on the functions ncread, ncwrite and ncinfo from
> > octcdf. Maybe someday, these functions will be implemented in octave
> > (as they are in matlab) and ncArray will be independent from octcdf.
> >
> > The package allows to access a single or a collection of NetCDF files
> > (or OPeNDAP URLs) as a multi-dimensional array.
> > For a collection of NetCDF files, the variables are concatenated along
> > a given dimension similar to the command cat. The ncArray object
> > contains only a reference to the underlying files. The data is loaded
> > only, if the array is indexed.
> >
> > For example, if the current directory containts file1.nc, file2.nc and
> > file3.nc and each file contains the 20 x 30 variable temp, then:
> >
> > A = ncCatArray(3,'file*.nc','temp')
> >
> > would create and array A of size 20 x 30 x 3 without actually loading
> > the files. Only when the array is index e.g., A(:,:,2:3), the file
> > file2.nc and file3.nc are loaded.
> >
> > Also, reduction operators are implement. For example, sum(A,3) would
> > compute the sum over the 3rd dimension and sequentially loading all
> > files.
> >
> > ncArray allows thus to write code for dataset which are too big to be
> > loaded in memory and still to write code that are independent on the
> > way the data is stored and how a data set is split across files.
> >
> > More example how to use this package are available here:
> > http://modb.oce.ulg.ac.be/mediawiki/index.php/NcArray
> >
> > Best rega
>
>
 Is there a reason not to integrate these functions into the octcdf package
directly?

Michael.