org.netlib.lapack
Class SGETC2
java.lang.Object
org.netlib.lapack.SGETC2
public class SGETC2
 extends java.lang.Object
SGETC2 is a simplified interface to the JLAPACK routine sgetc2.
This interface converts Javastyle 2D rowmajor arrays into
the 1D columnmajor 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
* =======
*
* SGETC2 computes an LU factorization with complete pivoting of the
* nbyn matrix A. The factorization has the form A = P * L * U * Q,
* where P and Q are permutation matrices, L is lower triangular with
* unit diagonal elements and U is upper triangular.
*
* This is the Level 2 BLAS algorithm.
*
* Arguments
* =========
*
* N (input) INTEGER
* The order of the matrix A. N >= 0.
*
* A (input/output) REAL array, dimension (LDA, N)
* On entry, the nbyn matrix A to be factored.
* On exit, the factors L and U from the factorization
* A = P*L*U*Q; the unit diagonal elements of L are not stored.
* If U(k, k) appears to be less than SMIN, U(k, k) is given the
* value of SMIN, i.e., giving a nonsingular perturbed system.
*
* LDA (input) INTEGER
* The leading dimension of the array A. LDA >= max(1,N).
*
* IPIV (output) INTEGER array, dimension(N).
* The pivot indices; for 1 <= i <= N, row i of the
* matrix has been interchanged with row IPIV(i).
*
* JPIV (output) INTEGER array, dimension(N).
* The pivot indices; for 1 <= j <= N, column j of the
* matrix has been interchanged with column JPIV(j).
*
* INFO (output) INTEGER
* = 0: successful exit
* > 0: if INFO = k, U(k, k) is likely to produce owerflow if
* we try to solve for x in Ax = b. So U is perturbed to
* avoid the overflow.
*
* Further Details
* ===============
*
* Based on contributions by
* Bo Kagstrom and Peter Poromaa, Department of Computing Science,
* Umea University, S901 87 Umea, Sweden.
*
* =====================================================================
*
* .. Parameters ..
Method Summary 
static void 
SGETC2(int n,
float[][] a,
int[] ipiv,
int[] jpiv,
intW info)

Methods inherited from class java.lang.Object 
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait 
SGETC2
public SGETC2()
SGETC2
public static void SGETC2(int n,
float[][] a,
int[] ipiv,
int[] jpiv,
intW info)