Re: Re: Export Complex Matrices
- To: mathgroup at smc.vnet.net
- Subject: [mg40774] Re: [mg40747] Re: Export Complex Matrices
- From: Kyriakos Chourdakis <tuxedomoon at yahoo.com>
- Date: Thu, 17 Apr 2003 03:33:30 -0400 (EDT)
- Reply-to: k.chourdakis at qmul.ac.uk
- Sender: owner-wri-mathgroup at wolfram.com
Jens,
I want the matrix to be exported in text format. It
has to be read in Fortran eventually. I was thinking
that I could export via Excel, but unfortunately CSV
is not supported in Mathematica 4.0
K.
16/04/2003 06.35.01, Jens-Peer Kuska
<kuska at informatik.uni-leipzig.de> wrote:
>Hi,
>
>I don't know for what system you have to export the
data.
>If you just want to save it and reread it in
Mathematica
>Put[COO,"data.m"]
>
>and
>
>COO=Get["data.m"]
>
>may be a good solution.
>The CSV format may also help you
>
>Export["COO.dat", COO, "CSV"];
>!! COO.dat
>
>gives
>
>2,3,2.E-9
>3,2,2.*^-9*I
>
>Regards
> Jens
>
>Kyriakos Chourdakis wrote:
>>
>> Dear all,
>>
>> I am trying to export matrices of the form
>>
>> COO = {{2, 3, 2. 10^-9}, {3, 2, 2. 10^-9 I}}
>>
>> with I the imaginary unit. It is the coordinate
>> representation of large sparse matrices. The first
two
>> columns are the coordinates, and the third is the
>> value. When I use the simple
>>
>> Export["COO.dat",COO]
>>
>> I guess Mathematica recognises the imaginary part
as string,
>> and exports
>>
>> 2 3 2.e-9
>> -9
>> 3 2 2. 10 I
>>
>> instead of
>>
>> 2 3 2.e-9
>> 3 2 2.e-9 I
>>
>> I am sure there is a simple way to get around the
>> problem, but I can't find it..
>>
>> I am using Mathematica 4.0 on Windows Me.
>>
>> Best
>>
>> K.
>>
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