[R-sig-Geo] APHRODITE V1101R2 NetCDF

[Andres Diaz]

Dear Iztirab,

For the size of your data you can use the package ncdf4 and rdhf5,
nevertheless, I was working with these files some weeks ago, and when the
files have huge quantity of data (I was working in a global scale with file
of 800 millions of elements) the RAM memory collapse. Python in this sense
is a little bit more powerful for the managing of big quantity of data.

If you decide to use python, the library to install is called netCDF4

Best,


Andrés Díaz
Postdoctoral Researcher
Institute for Environmental Studies - IVM
VU University Amsterdam
De Boelelaan 1085 (visiting address)
De Boelelaan 1087 (postal address)
1081 HV Amsterdam, The Netherlands
t: + 31 (0)20 5983232
email: andres.diazloaiza at vu.nl
Office: A602
IVM - Because the Earth matters

2016-01-06 5:54 GMT+01:00 Michael Sumner <mdsumner at gmail.com>:

> On Wed, Jan 6, 2016 at 2:40 PM, Iztirab Hussain via R-sig-Geo
> <r-sig-geo at r-project.org> wrote:
> > Hi everyoneWould any one like to share the script to handle the above
> mentioned .nc file in rstudio to get the output in text,csv or xlsx.The
> dimention of this data set are as below180 x 140 elements for APHROSpatial
> coverage      :  (MA) 60.0E - 150.0E, 15.0S - 55.0N Spatial resolution
> :  0.5 degree and 0.25 degree latitude/longitude
> >  Temporal coverage     :  January 1, 1951 - December 31, 2007 (57 years)
> >  Temporal resolution   :  DailyRegardsShakir
>
>
> I would start with this:
>
> library(ncdf4)  ## note this is now available on Windows via CRAN
> (since Dec 2015)
> library(raster)
>
> r <- raster("myfile.nc")
>
> ## if that works, try
> plot(r)
>
> >From there you can do anything you like, including convert to a text
> format - but I wouldn't recommend that!  See the help for ?raster and
> come back with questions if you can't get what you need. Please read
> the posting guidelines and provide details.
>
> (If raster complains about a non-regular grid it's another story, but
> still easy enough to deal with using ncdf4 directly or with raster's
> cunning tricks. If you need help there you'll need to provide a link
> to an exact file specifically so someone can try. )
>
> Cheers, Mike.
>
>
>
>
>
> >
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> >
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>
>
>
> --
> Michael Sumner
> Software and Database Engineer
> Australian Antarctic Division
> Hobart, Australia
> e-mail: mdsumner at gmail.com
>
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