org.netlib.lapack
Class Spotf2

java.lang.Object
  org.netlib.lapack.Spotf2

public class Spotf2
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
 *  =======
 *
 *  SPOTF2 computes the Cholesky factorization of a real symmetric
 *  positive definite matrix A.
 *
 *  The factorization has the form
 *     A = U' * U ,  if UPLO = 'U', or
 *     A = L  * L',  if UPLO = 'L',
 *  where U is an upper triangular matrix and L is lower triangular.
 *
 *  This is the unblocked version of the algorithm, calling Level 2 BLAS.
 *
 *  Arguments
 *  =========
 *
 *  UPLO    (input) CHARACTER*1
 *          Specifies whether the upper or lower triangular part of the
 *          symmetric matrix A is stored.
 *          = 'U':  Upper triangular
 *          = 'L':  Lower triangular
 *
 *  N       (input) INTEGER
 *          The order of the matrix A.  N >= 0.
 *
 *  A       (input/output) REAL array, dimension (LDA,N)
 *          On entry, the symmetric matrix A.  If UPLO = 'U', the leading
 *          n by n upper triangular part of A contains the upper
 *          triangular part of the matrix A, and the strictly lower
 *          triangular part of A is not referenced.  If UPLO = 'L', the
 *          leading n by n lower triangular part of A contains the lower

 *          triangular part of the matrix A, and the strictly upper
 *          triangular part of A is not referenced.
 *
 *          On exit, if INFO = 0, the factor U or L from the Cholesky
 *          factorization A = U'*U  or A = L*L'.
 *
 *  LDA     (input) INTEGER
 *          The leading dimension of the array A.  LDA >= max(1,N).
 *
 *  INFO    (output) INTEGER
 *          = 0: successful exit
 *          < 0: if INFO = -k, the k-th argument had an illegal value
 *          > 0: if INFO = k, the leading minor of order k is not
 *               positive definite, and the factorization could not be
 *               completed.
 *
 *  =====================================================================
 *
 *     .. Parameters ..

Constructor Summary

Spotf2()

Method Summary

static void

spotf2(java.lang.String uplo, int n, float[] a, int _a_offset, int lda, intW info)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Spotf2

public Spotf2()

Method Detail

spotf2

public static void spotf2(java.lang.String uplo,
                          int n,
                          float[] a,
                          int _a_offset,
                          int lda,
                          intW info)