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java.lang.ObjectJampack.Zhqrd
public class Zhqrd
Computes a Householder QR decomposition.Specifically, given a matrix A there are is a unitary matrix U such that
QA = Rwhere R is zero below its diagonal. In constructing this decomposition, Zhqrd represents Q as a product of Householder transformations with each transformation represented by a Z1. R is represented by a Zutmat. Methods are provided to apply the transformations to other matrices.
Field Summary | |
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int |
ncol
The number of columns in A |
int |
nrow
The number of rows in A |
int |
ntran
The number of Householder transformations |
Zutmat |
R
The R factor. |
Z1[] |
U
An array containing the generating vectors for the Householder transformations. |
Constructor Summary | |
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Zhqrd(Zmat A)
Computes a Householder QR decomposition of a Zmat |
Method Summary | |
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Zmat |
bq(Zmat B)
Computes the product BQ. |
Zmat |
bqh(Zmat A,
Zmat B)
Computes the product BQH. |
Zmat |
qb(Zmat B)
Computes the product QB. |
Zmat |
qhb(Zmat B)
Computes the product QHB. |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public int nrow
public int ncol
public int ntran
public Z1[] U
public Zutmat R
Constructor Detail |
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public Zhqrd(Zmat A) throws JampackException
A
- A Zmat
JampackException
- Passed from below.Method Detail |
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public Zmat qb(Zmat B) throws JampackException
B
- A Zmat
JampackException
- Thrown for inconsistent dimensions.public Zmat qhb(Zmat B) throws JampackException
B
- A Zmat
JampackException
- Thrown for inconsistent dimensions.public Zmat bq(Zmat B) throws JampackException
B
- A Zmat
JampackException
- Thrown for inconsistent dimensions.public Zmat bqh(Zmat A, Zmat B) throws JampackException
B
- A Zmat
JampackException
- Thrown for inconsistent dimensions.
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