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Server for the positive definite QR method of computing eigenvalues. More...
#include <rw/lapack/seigsrv.h>
Public Member Functions | |
RWSymPDQREigServer (bool computeVecs=true) | |
virtual RWSymEigDecomp< TypeT > | decompose (const RWTriDiagDecomp< TypeT > &A) |
virtual bool | computeEigenVectors () const |
void | computeEigenVectors (bool computeVecs) |
The class RWSymPDQREigServer<T> is the server for the positive definite QR method of computing eigenvalues. This server applies only to matrices that you know are positive definite. Trying to use it on nonpositive definite matrices results in a decomposition with the incomplete flag set; you can test for this in the class RWSymEigDecomp<T> . Use of this server with positive definite matrices can result in much more accurate eigenvalues and eigenvectors.
#include <rw/lapack/seigsrv.h> RWSymPDQREigServer<double> server; RWSymEigDecomp<double> eig = server(A); // A is a RWSymBandMat<double>
#include <iostream> #include <rw/lapack/seigsrv.h> int main() { RWSymMat<double> A; // input a matrix std::cin >> A; RWSymPDQREigServer<double> server; // configure a server server.computeEigenVectors(false); // turn off eigenvectors RWSymEigDecomp<double> eig = server(A); return 0; }
RWSymPDQREigServer< TypeT >::RWSymPDQREigServer | ( | bool | computeVecs = true |
) |
Constructs a server. The parameter indicates whether this server should be configured to compute eigenvectors as well as eigenvalues.
void RWSymPDQREigServer< TypeT >::computeEigenVectors | ( | bool | computeVecs | ) |
Sets whether or not the server should compute eigenvectors as well as eigenvalues.
virtual bool RWSymPDQREigServer< TypeT >::computeEigenVectors | ( | ) | const [virtual] |
Returns true
if this server is configured to compute eigenvectors as well as eigenvalues.
Implements RWSymEigServer< TypeT >.
virtual RWSymEigDecomp<TypeT> RWSymPDQREigServer< TypeT >::decompose | ( | const RWTriDiagDecomp< TypeT > & | A | ) | [virtual] |
Computes the eigenvalue decomposition of the tridiagonal matrix inside the tridiagonal decomposition.
Implements RWSymEigServer< TypeT >.
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