Message-ID: <448E788E.8080707@gmail.com>
Date: 2006-06-13T08:34:22Z
From: antonio rodriguez
Subject: how to read CRU climatic data files with R?
In-Reply-To: <8B84E377-AD2C-47B7-AD6B-8FBCF3336B7F@ird.fr>
Nicolas Degallier wrote:
> Hi R helpers,
>
> I have downloaded time series of climatic data from CRU (Climatic
> Research Unit) which are ASCII files with a specific format for the
> data.
> The format is described here:
>
> http://www.cru.uea.ac.uk/~timm/grid/CRU_TS_2_1.html
>
> under the link "file format".
>
> I would like to know if somebody has already written some script in R
> to open and manage these data, for example for selecting only
> portions of the time series and/or pieces of the spatial grid?
Hi Nicolas,
You will find in that page, below Data structure section, a link to
'software'. There you will find a package 'CRU2nc.tgz' which converts
your ASCII data to 'netCDF' format. Then you can use any of the netCDF
libraries available in R: ncdf,ncvar, RNetCDF, and the old netCDF.
I've found, at least for me, before to enter the data in R, to
manipulate them with Ferret (http://ferret.pmel.noaa.gov/Ferret/)
(subsetting regions and time intervals, etc.)
Hope this helps,
Antonio
>
> Cheers,
>
> Nicolas Degallier
>
> UMR 7159 / IRD UR182
> Laboratoire d'Oc?anographie et du Climat, Exp?rimentation et
> Approches Num?riques (LOCEAN)
> Tour 45-55, 4e ?t., case 100, 4 place Jussieu
> 75252 Paris Cedex 5 France
>
> t?l: (33) 01 44 27 51 57
> fax: (33) 01 44 27 38 05
> E-mail: <Nicolas.Degallier at ird.fr>
>
> Publications (anonymous ftp):
>
> ftp://ftp.lodyc.jussieu.fr/LOCEAN/ndelod
>
> _______________________________________________
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>
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