org.netlib.lapack
Class Dorg2l
java.lang.Object
org.netlib.lapack.Dorg2l
public class Dorg2l
- extends java.lang.Object
Following is the description from the original
Fortran source. For each array argument, the Java
version will include an integer offset parameter, so
the arguments may not match the description exactly.
Contact seymour@cs.utk.edu with any questions.
* ..
*
* Purpose
* =======
*
* DORG2L generates an m by n real matrix Q with orthonormal columns,
* which is defined as the last n columns of a product of k elementary
* reflectors of order m
*
* Q = H(k) . . . H(2) H(1)
*
* as returned by DGEQLF.
*
* Arguments
* =========
*
* M (input) INTEGER
* The number of rows of the matrix Q. M >= 0.
*
* N (input) INTEGER
* The number of columns of the matrix Q. M >= N >= 0.
*
* K (input) INTEGER
* The number of elementary reflectors whose product defines the
* matrix Q. N >= K >= 0.
*
* A (input/output) DOUBLE PRECISION array, dimension (LDA,N)
* On entry, the (n-k+i)-th column must contain the vector which
* defines the elementary reflector H(i), for i = 1,2,...,k, as
* returned by DGEQLF in the last k columns of its array
* argument A.
* On exit, the m by n matrix Q.
*
* LDA (input) INTEGER
* The first dimension of the array A. LDA >= max(1,M).
*
* TAU (input) DOUBLE PRECISION array, dimension (K)
* TAU(i) must contain the scalar factor of the elementary
* reflector H(i), as returned by DGEQLF.
*
* WORK (workspace) DOUBLE PRECISION array, dimension (N)
*
* INFO (output) INTEGER
* = 0: successful exit
* < 0: if INFO = -i, the i-th argument has an illegal value
*
* =====================================================================
*
* .. Parameters ..
Method Summary |
static void |
dorg2l(int m,
int n,
int k,
double[] a,
int _a_offset,
int lda,
double[] tau,
int _tau_offset,
double[] work,
int _work_offset,
intW info)
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Dorg2l
public Dorg2l()
dorg2l
public static void dorg2l(int m,
int n,
int k,
double[] a,
int _a_offset,
int lda,
double[] tau,
int _tau_offset,
double[] work,
int _work_offset,
intW info)