Hi Lily:
I doubt the mail-list would pass through the netcdf file. Instead, could you do
the following, and post the results:
library(ncdf4
pre1 = nc_open('sample_precip_daily.nc')
str(pre1)
nc_close(pre1)
I have a feeling you haven't worked much with netcdf files. I will try to find
a tutorial also to help you along.
Thanks,
-Roy
> On Jul 26, 2016, at 12:07 PM, lily li <chocol...@gmail.com> wrote:
>
> Thanks for your reply. But it says "Error in (function (classes, fdef,
> mtable)):
> unable to find an inherited method for function 'brick' for signature
> 'ncdf4' "
>
> The dataset is attached. It contains daily precipitation data for 20 years,
> within a rectangle, so that there are several grid points. I use the code
> to open it, but don't know how to get csv files, while each file contains
> continuous daily precipitation data for each grid cell.
> pre1 = nc_open('sample_precip_daily.nc')
> pre1
> pre1_rd = ncvar_get(pre1, 'precipitation')
> nc_close(pre1)
>
> Thanks for your help.
>
> On Tue, Jul 26, 2016 at 4:08 AM, Jon Skoien <jon.sko...@jrc.ec.europa.eu>
> wrote:
>
>> You could try with the brick function from the raster package.
>>
>> bvar = brick(netcdfName)
>>
>> This uses the ncdf4 functions for opening and reading the netcdf, but
>> makes it easier to extract data for each day:
>>
>> p1 = rasterToPoints(bvar[[1]])
>> and write p1 to csv.
>>
>> Best,
>> Jon
>>
>>
>>
>> On 7/26/2016 6:54 AM, lily li wrote:
>>
>>> Hi all,
>>>
>>> I have a problem in opening netcdf files. If one netcdf file contains
>>> longitude, latitude, and daily precipitation. How to relate each
>>> precipitation record to its associated location, and export them as csv
>>> files? Thanks.
>>>
>>> I just use nc_open(), ncvar_get(), but it is not very helpful. Thanks for
>>> any ideas.
>>>
>>> [[alternative HTML version deleted]]
>>>
>>> ______________________________________________
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>>> PLEASE do read the posting guide
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>>>
>>>
>> --
>> Jon Olav Skøien
>> Joint Research Centre - European Commission
>> Institute for Space, Security & Migration
>> Disaster Risk Management Unit
>>
>> Via E. Fermi 2749, TP 122, I-21027 Ispra (VA), ITALY
>>
>> jon.sko...@jrc.ec.europa.eu
>> Tel: +39 0332 789205
>>
>> Disclaimer: Views expressed in this email are those of the individual and
>> do not necessarily represent official views of the European Commission.
>>
> ______________________________________________
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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**********************
"The contents of this message do not reflect any position of the U.S.
Government or NOAA."
**********************
Roy Mendelssohn
Supervisory Operations Research Analyst
NOAA/NMFS
Environmental Research Division
Southwest Fisheries Science Center
***Note new address and phone***
110 Shaffer Road
Santa Cruz, CA 95060
Phone: (831)-420-3666
Fax: (831) 420-3980
e-mail: roy.mendelss...@noaa.gov www: http://www.pfeg.noaa.gov/
"Old age and treachery will overcome youth and skill."
"From those who have been given much, much will be expected"
"the arc of the moral universe is long, but it bends toward justice" -MLK Jr.
______________________________________________
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