[gradsusr] Fw: EOF and spectral analysis on GrADS

[ugo okoro]

Hi Tereza,

with regards the running eof on windows, i am having problem sorting out the "eofudf" problem.

ugo okoro
cmsr-iqp,
cas, beijing



>________________________________
> From: "tcavazos at cicese.mx" <tcavazos at cicese.mx>
>To: GrADS Users Forum <gradsusr at gradsusr.org> 
>Sent: Monday, January 28, 2013 1:57 AM
>Subject: Re: [gradsusr] Fw: EOF and spectral analysis on GrADS
> 
>Here is the link for EOFgrads:
>
>http://www.atmos.ucla.edu/~munnich/Grads/EOF/
>
>Tereza
>
>
>>  http://www.netlib.org/lapack/patch-3.0/src/
>> for example
>> Given a square (N,N) real non-symmetric matrix, compute the eigenvalues
>> and, optionally, the left and/or right eigenvectors via the LAPACK
>> subroutine :-
>>
>> SVD Method
>> http://www.netlib.org/lapack/patch-3.0/src/dgeevx.f
>>
>> On Sun, Jan 27, 2013 at 2:21 AM, Jose <veiga.uea at gmail.com> wrote:
>>
>>> Dear Tamer Nada
>>>
>>> Thank you by your explanation and suggestions. They were clear.
>>>
>>> By the way do you know where can I found the fortran subroutines from
>>> lepak library you commented?
>>>
>>>
>>> Thanks in advance
>>>
>>> Enviado via iPad
>>>
>>> Em 26/01/2013, às 16:53, Tamer Nada <tamer540 at gmail.com> escreveu:
>>>
>>> Dear :- Jose Augusto Paixão Veiga
>>>
>>> In Fortran :-
>>>
>>> You must know there is about 3 methods ( algorithms )  to calculate
>>> eigen
>>> Vector and eigen Value  each method some of it efficient but just
>>> compute
>>> only first Eigen value and first Eigen vector by suggest value and using
>>> iteration methods to compute it until reach to the difference between
>>> old
>>> value from last iteration to new value equal small fraction you can
>>> determine it . another to methods using "SVD "  and this method its
>>> divided
>>> by to relative to the shap of data matrix   and some of it efficient but
>>> slow and some fast and not efficient
>>>
>>> I suggest to you to use lepak library in fortran ( its easy to call
>>> subroutine ) or using high level language or statistical or climatic
>>> package like NCL or R or Matlab
>>>
>>> On Sat, Jan 26, 2013 at 9:56 PM, Jose Augusto Paixão Veiga <
>>> veiga.uea at gmail.com> wrote:
>>>
>>>> Dear EOF expertise,
>>>>
>>>> one of you would have a material given instruction (if possible step by
>>>> step) on how to calculate EOF?
>>>>
>>>> I would like to do a fortran program, from the initial point (for
>>>> example: 1-read a 3-d matrix data, 2-calculate its inversion,
>>>> 3-multiply it
>>>> by its ....), to calculate EOF for climate study purposes.
>>>>
>>>> A flux diagram will be very appreciated.
>>>>
>>>> Thanks in advance.
>>>>
>>>>   Augusto
>>>>
>>>>
>>>> On Jan 26, 2013, at 3:41 PM, Tamer Nada <tamer540 at gmail.com> wrote:
>>>>
>>>> on Grads No, but you can use NCL  or R to compute EOF; and Only R  or
>>>> Matlab to Compute CCA ,But also you can Use NCL to compute "SVD" and
>>>> after
>>>> that you can compute CCA ,actually NCL have function to compute CCA
>>>> ,But
>>>> not efficient because  its use old IBM Fortran subroutine ,so its not
>>>> work
>>>> fine with big array of data and may be hang in calculation ,so i prefer
>>>> to
>>>> use SVD function and after that you can compute CCA
>>>>
>>>> On Sat, Jan 26, 2013 at 9:58 AM, ugo okoro <uknac23 at yahoo.com> wrote:
>>>>
>>>>>
>>>>> Dear all,
>>>>>
>>>>> Please any info on how to run EOF and spectral analysis
>>>>> (frequency-time)
>>>>> on GrADS?
>>>>>
>>>>> Anticipating prompt response.
>>>>>
>>>>> Thanks.
>>>>>
>>>>> Ugo Okoro.
>>>>> CMSR-IAP
>>>>> CAS, Beijing.
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> gradsusr mailing list
>>>>> gradsusr at gradsusr.org
>>>>> http://gradsusr.org/mailman/listinfo/gradsusr
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> =====================
>>>> *Tamer Ali Nada *
>>>> **
>>>> *Research Worker*
>>>> **
>>>> *Cairo Numerical Weather Prediction Center { CNWP}*
>>>> **
>>>> *Egyption Meteorological Authority   { EMA }*
>>>> **
>>>> *Cairo , Egypt*
>>>>  ============================
>>>> *tamer540 at yahoo.com
>>>> tamer540 at gmail.com
>>>> tamer.nada at noaa.gov*
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>>>>
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>>>>
>>>
>>>
>>> --
>>> =====================
>>> *Tamer Ali Nada *
>>> **
>>> *Research Worker*
>>> **
>>> *Cairo Numerical Weather Prediction Center { CNWP}*
>>> **
>>> *Egyption Meteorological Authority   { EMA }*
>>> **
>>> *Cairo , Egypt*
>>>  ============================
>>> *tamer540 at yahoo.com
>>> tamer540 at gmail.com
>>> tamer.nada at noaa.gov*
>>>
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>>
>>
>> --
>> =====================
>> *Tamer Ali Nada *
>> **
>> *Research Worker*
>> **
>> *Cairo Numerical Weather Prediction Center { CNWP}*
>> **
>> *Egyption Meteorological Authority   { EMA }*
>> **
>> *Cairo , Egypt*
>>  ============================
>> *tamer540 at yahoo.com
>> tamer540 at gmail.com
>> tamer.nada at noaa.gov*
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>
>
>-- 
>Tereza Cavazos
>Departamento de Oceanografia Fisica
>CICESE
>Ensenada, Baja California, MEXICO
>http://usuario.cicese.mx/~tcavazos/
>
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