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Ublas : |
From: nisha kannookadan (nishak44_at_[hidden])
Date: 2008-01-12 14:37:41
I found it out.. :)
Thanks
> Hi Karl
>
> Thanx so much, but this isnt the problem. I have all this in it, but it has some mistakes
> in the email, it doesnt show it. I post it again and hope, it will appear, when I sent it.
>
> Im obviously a newbie with this bindings, I downloaded LAPACK now and I guess I need
> to link it, but I have no clue about this all. I dont even make to install LAPACK on my
> mac, Im happy about any help.
>
> Nisha
>
> Code
>
> #include \
> #include \
> #include \
> #include \
>
>
> namespace ublas = boost::numeric::ublas;
> namespace lapack = boost::numeric::bindings::lapack;
>
> int main() {
>
> ublas::matrix\ A(3,3);
> A(0,0) = 1;
> A(0,1) = 1;
> A(0,2) = 1;
> A(1,0) = 2;
> A(1,1) = 3;
> A(1,2) = 1;
> A(2,0) = 1;
> A(2,1) = -1;
> A(2,2) = -1;
>
> std:: cout << A << std::endl;
>
> ublas::matrix\ B(3,1);
> B(0,0) = 4;
> B(0,1) = 9;
> B(0,2) = -2;
>
> std::cout << B << std::endl;
>
> lapack::gesv(A,B);
>
> std::cout << B << std::endl;
> }
>
>
>
>
>
> ----------------------------------------
>> Date: Sat, 12 Jan 2008 19:03:14 +0100
>> From: karl.meerbergen_at_[hidden]
>> To: ublas_at_[hidden]
>> Subject: Re: [ublas] Lapack-solve linear equations
>>
>> Dear Nisha,
>>
>> You should include the following files:
>> boost/numeric/bindings/traits/ublas_matrix.hpp
>> boostnumeric/bindings/lapack/gesv.hpp
>>
>> Also, make sure dense_matrix is column_major!
>>
>> Good luck,
>>
>> Karl
>>
>>
>>
>>
>> nisha kannookadan wrote:
>>> Hi all
>>>
>>> Im trying to use the bindings, but something is wrong, but the error feedback aint helpful.
>>>
>>> This is the code:
>>>
>>>
>>> #include
>>> #include
>>> #include
>>> #include
>>> #include
>>> #include
>>>
>>>
>>> #include
>>> #include
>>>
>>>
>>> #define NDEBUG
>>>
>>> using namespace boost::numeric;
>>>
>>> int main() {
>>>
>>> ublas::matrix A(5,5);
>>> ublas::matrix b(5,1);
>>>
>>> // Construct a simple matrix
>>> for (int i=0; i<=j ? 5.0+i-j : 0.0;
>>>
>>> std::cout << A << std::endl;
>>>
>>> for (int i=0; i<< b << std::endl;
>>> }
>>>
>>> I believe, this should work, but the line: bindings::lapack::gesv(A,b); gives trouble, it says "Undefined symbols",
>>> but I put its header in it.
>>>
>>> Thanks for any help
>>>
>>> Nisha K
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>>
>
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