Subject: Re: [ublas] set of ublas matrix
From: Ralf Philipp Denzer (Ralf.Denzer_at_[hidden])
Date: 2011-08-06 09:12:49
Hello Yajima,
just a remark: you can access the component (k,l) of the i-th matrix A(i)
directly by, e.g.
A(i)(k,l) = 1.0;
So, it's not necessary to introduce 'local' matrices b and/or c. But it's
not wrong to do so.
Bye
Ralf
On 08/04/2011 05:40 PM, Masanao Yajima wrote:
> Hi Ralf
>
> That is exactly what I was looking for.
> Your code worked perfectly.
> Thank you so much!
>
> Cheers
>
> Yajima
>
> On Thu, Aug 4, 2011 at 12:33 AM, Ralf Philipp Denzer
> <Ralf.Denzer_at_[hidden] <mailto:Ralf.Denzer_at_[hidden]>> wrote:
>
> Hello Yajima,
>
> you can do something like
>
> ublas::vector<ublas::matrix<double> > A;
>
> I.e.:
>
> ublas::vector<dmatrix> A;
> A.resize(10); // vector containing 10 ublas::matrices
>
> for( int i=0;i<10;i++){
> dmatrix b(10,10);
> set values to b;
>
> // set the correct size of matrix A(i)
> A(i).resize(b.size1(), b.size2());
> A(i) =b;
> }
>
> That should work ... (not tested)
>
> You can use also:
> std::vector<ublas::matrix<double> > A;
> or
> std::map<int, ublas::matrix<double> > A;
> or other containers ...
> Depends what you prefer ...
>
> Bye
>
> Ralf
>
>
>
>
>
>
> On 08/04/2011 01:03 AM, Masanao Yajima wrote:
>> Hi List
>>
>> Is there away to create a "set" of ublas matrix.
>> (by set I mean it in the most abstract way)
>>
>> I would like to create bunch of matrix<double> and store it in
>> some form of a data structure
>> then retrieve them by an index and use it as a matrix<double>.
>>
>> Here is a vague pseudo code for what I would like to do
>>
>> something A;
>> for( int i=0;i<10;i++){
>> dmatrix b(10,10);
>> set values to b;
>> A(i) =b;
>> }
>>
>> //then use it as
>>
>> for( int i=0;i<10;i++){
>> dmatrix c = A(i);
>> do calculation with c
>> }
>>
>> Or if you have better way to do something similar, I'd appreciate
>> your input.
>>
>> Thank you for your help.
>>
>> Cheers
>> Yajima
>>
>>
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>
>
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>
>
>
> --
> Masanao Yajima
>
>
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