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Re: calculating the eigen matrix
From: |
Quentin Spencer |
Subject: |
Re: calculating the eigen matrix |
Date: |
Fri, 04 Jun 2004 10:50:19 -0500 |
User-agent: |
Mozilla Thunderbird 0.6 (X11/20040519) |
This is from some old code I wrote:
ComplexMatrix R(size,size), V(size,size);
// Assign R to something...
V = EIG(R).eigenvectors();
Note that the data type doesn't have to be ComplexMatrix--it could also
be just Matrix. I only needed the eigenvectors in this particular
application. If you wanted both eigenvalues and eigenvectors, a better
way would probably be something like this:
EIG EVD;
Matrix A,B;
ColumnVector c;
// Assign A to something...
EVD=EIG(A);
B=EVD.eigenvectors();
c=EVD.eigenvalues();
This code is untested--just based on what I remember from doing this
sort of thing in the past. I hope this helps.
Regards,
Quentin Spencer
Tapesh wrote:
Hi,
I am writing an application in C/C++ and want to use Octave library to
calculate the eigen matrix and eigen-values.
I am able to compile octave successfully and to write a sample C++
programme.
Can someone provide a sample code to calculate eigen vectors?
Thanks in Advance,
Tapesh Kr. Agarwal
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