[ncl-talk] EOF analysis

[Wei Huang]

Nana,

Try change line:
  cru    = f->pre(iYYYY,:,:)
to:
  cru    = f->pre(iYYYY,{lat|latS:latN},{lon|lonE:lonE})

Which may solve your memory problem.

Good luck.

Wei

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On Sat, Apr 25, 2015 at 2:55 PM, Alessandra Giannini <
alesall at iri.columbia.edu> wrote:

>
> Hello Nana,
>
> it looks like this could be generically a memory issue - your computer has
> a hard time managing all the data it is ingesting.
>
> As boring as this will sound, my suggestion is that you execute your
> script line by line, to see where it fails.
> By this I mean starting NCL and copying and pasting into the NCL
> environment line by line…
>
> warm regards, ale
>
>
>
>
>
>
> --
> Alessandra Giannini
> IRI for Climate and Society - The Earth Institute at Columbia University
> P.O. Box 1000, Palisades NY 10964-8000
> phone/fax: +1 845 680-4473/4864 - email: alesall at iri.columbia.edu
>
> On Apr 25, 2015, at 1:41 PM, Nana kofi Appiah-badu <justappia at gmail.com>
> wrote:
>
> > Hello everyone,
> >
> > I downloaded the eof script and using it to perform an eof analysis to
> obtain the first three eofs and their corresponding time series from the
> cru data from 1958 to 2008 during the MAM (MARCH, APRIL, MAY ) season. but
> this error message pops up after i start to run the script:
> >
> > fatal:NclMalloc Failed:[errno=12]
> > Segmentation fault (core dumped)
> >
> > below is the full output when i run the script.
> >
> > Variable: f
> > Type: file
> > filename:    cru
> > path:    cru.nc
> >    file global attributes:
> >       Conventions : CF-1.4
> >       title : CRU TS3.21 Precipitation
> >       institution : Data held at British Atmospheric Data Centre, RAL,
> UK.
> >       source : Run ID = 1307101324
> > Data generated by BADC from:
> > pre.1307101049.dtb
> >       history : Wed 10 Jul 2013 18:28:10 BST : User ianharris : Program
> makegridsauto.for called by update.for
> >       references : Information on the data is available at
> http://badc.nerc.ac.uk/data/cru/
> >       comment : Data restrictions: for academic research use
> only.Contact BADC for details
> >       contact : BADC <badc at rl.ac.uk>
> >    dimensions:
> >       lon = 720
> >       lat = 360
> >       time = 1344  // unlimited
> >    variables:
> >       double lon ( lon )
> >          long_name :    longitude
> >          units :    degrees_east
> >
> >       double lat ( lat )
> >          long_name :    latitude
> >          units :    degrees_north
> >
> >       double time ( time )
> >          long_name :    time
> >          units :    days since 1900-1-1
> >          calendar :    gregorian
> >
> >       double pre ( time, lat, lon )
> >          long_name :    precipitation
> >          units :    mm
> >          correlation_decay_distance :     450
> >          _FillValue :    9.969209968386869e+36
> >          missing_value :    9.969209968386869e+36
> >
> >
> > Variable: cru
> > Type: double
> > Total Size: 1269043200 bytes
> >             158630400 values
> > Number of Dimensions: 3
> > Dimensions and sizes:    [time | 612] x [lat | 360] x [lon | 720]
> > Coordinates:
> >             time: [21199..39796]
> >             lat: [-89.75..89.75]
> >             lon: [-179.75..179.75]
> > Number Of Attributes: 5
> >   long_name :    precipitation
> >   units :    mm
> >   correlation_decay_distance :     450
> >   _FillValue :    9.969209968386869e+36
> >   missing_value :    9.969209968386869e+36
> > fatal:NclMalloc Failed:[errno=12]
> > Segmentation fault (core dumped
> >
> > i have attached the script and the error after starting to run.
> >
> > Thank you for your time  and assistance.
> >
> > Regards,
> >
> > Nana.
> > <eof_1.ncl><error
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