org.netlib.lapack
Class SGGLSE

java.lang.Object
  extended by org.netlib.lapack.SGGLSE

public class SGGLSE
extends java.lang.Object

SGGLSE is a simplified interface to the JLAPACK routine sgglse.
This interface converts Java-style 2D row-major arrays into
the 1D column-major linearized arrays expected by the lower
level JLAPACK routines.  Using this interface also allows you
to omit offset and leading dimension arguments.  However, because
of these conversions, these routines will be slower than the low
level ones.  Following is the description from the original Fortran
source.  Contact seymour@cs.utk.edu with any questions.

* .. * * Purpose * ======= * * SGGLSE solves the linear equality-constrained least squares (LSE) * problem: * * minimize || c - A*x ||_2 subject to B*x = d * * where A is an M-by-N matrix, B is a P-by-N matrix, c is a given * M-vector, and d is a given P-vector. It is assumed that * P <= N <= M+P, and * * rank(B) = P and rank( ( A ) ) = N. * ( ( B ) ) * * These conditions ensure that the LSE problem has a unique solution, * which is obtained using a GRQ factorization of the matrices B and A. * * Arguments * ========= * * M (input) INTEGER * The number of rows of the matrix A. M >= 0. * * N (input) INTEGER * The number of columns of the matrices A and B. N >= 0. * * P (input) INTEGER * The number of rows of the matrix B. 0 <= P <= N <= M+P. * * A (input/output) REAL array, dimension (LDA,N) * On entry, the M-by-N matrix A. * On exit, A is destroyed. * * LDA (input) INTEGER * The leading dimension of the array A. LDA >= max(1,M). * * B (input/output) REAL array, dimension (LDB,N) * On entry, the P-by-N matrix B. * On exit, B is destroyed. * * LDB (input) INTEGER * The leading dimension of the array B. LDB >= max(1,P). * * C (input/output) REAL array, dimension (M) * On entry, C contains the right hand side vector for the * least squares part of the LSE problem. * On exit, the residual sum of squares for the solution * is given by the sum of squares of elements N-P+1 to M of * vector C. * * D (input/output) REAL array, dimension (P) * On entry, D contains the right hand side vector for the * constrained equation. * On exit, D is destroyed. * * X (output) REAL array, dimension (N) * On exit, X is the solution of the LSE problem. * * WORK (workspace/output) REAL array, dimension (LWORK) * On exit, if INFO = 0, WORK(1) returns the optimal LWORK. * * LWORK (input) INTEGER * The dimension of the array WORK. LWORK >= max(1,M+N+P). * For optimum performance LWORK >= P+min(M,N)+max(M,N)*NB, * where NB is an upper bound for the optimal blocksizes for * SGEQRF, SGERQF, SORMQR and SORMRQ. * * If LWORK = -1, then a workspace query is assumed; the routine * only calculates the optimal size of the WORK array, returns * this value as the first entry of the WORK array, and no error * message related to LWORK is issued by XERBLA. * * INFO (output) INTEGER * = 0: successful exit. * < 0: if INFO = -i, the i-th argument had an illegal value. * * ===================================================================== * * .. Parameters ..


Constructor Summary
SGGLSE()
           
 
Method Summary
static void SGGLSE(int m, int n, int p, float[][] a, float[][] b, float[] c, float[] d, float[] x, float[] work, int lwork, intW info)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SGGLSE

public SGGLSE()
Method Detail

SGGLSE

public static void SGGLSE(int m,
                          int n,
                          int p,
                          float[][] a,
                          float[][] b,
                          float[] c,
                          float[] d,
                          float[] x,
                          float[] work,
                          int lwork,
                          intW info)