org.netlib.lapack
Class Sgbcon

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

public class Sgbcon
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 * ======= * * SGBCON estimates the reciprocal of the condition number of a real * general band matrix A, in either the 1-norm or the infinity-norm, * using the LU factorization computed by SGBTRF. * * An estimate is obtained for norm(inv(A)), and the reciprocal of the * condition number is computed as * RCOND = 1 / ( norm(A) * norm(inv(A)) ). * * Arguments * ========= * * NORM (input) CHARACTER*1 * Specifies whether the 1-norm condition number or the * infinity-norm condition number is required: * = '1' or 'O': 1-norm; * = 'I': Infinity-norm. * * N (input) INTEGER * The order of the matrix A. N >= 0. * * KL (input) INTEGER * The number of subdiagonals within the band of A. KL >= 0. * * KU (input) INTEGER * The number of superdiagonals within the band of A. KU >= 0. * * AB (input) REAL array, dimension (LDAB,N) * Details of the LU factorization of the band matrix A, as * computed by SGBTRF. U is stored as an upper triangular band * matrix with KL+KU superdiagonals in rows 1 to KL+KU+1, and * the multipliers used during the factorization are stored in * rows KL+KU+2 to 2*KL+KU+1. * * LDAB (input) INTEGER * The leading dimension of the array AB. LDAB >= 2*KL+KU+1. * * IPIV (input) INTEGER array, dimension (N) * The pivot indices; for 1 <= i <= N, row i of the matrix was * interchanged with row IPIV(i). * * ANORM (input) REAL * If NORM = '1' or 'O', the 1-norm of the original matrix A. * If NORM = 'I', the infinity-norm of the original matrix A. * * RCOND (output) REAL * The reciprocal of the condition number of the matrix A, * computed as RCOND = 1/(norm(A) * norm(inv(A))). * * WORK (workspace) REAL array, dimension (3*N) * * IWORK (workspace) INTEGER array, dimension (N) * * INFO (output) INTEGER * = 0: successful exit * < 0: if INFO = -i, the i-th argument had an illegal value * * ===================================================================== * * .. Parameters ..


Constructor Summary
Sgbcon()
           
 
Method Summary
static void sgbcon(java.lang.String norm, int n, int kl, int ku, float[] ab, int _ab_offset, int ldab, int[] ipiv, int _ipiv_offset, float anorm, floatW rcond, float[] work, int _work_offset, int[] iwork, int _iwork_offset, intW info)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Sgbcon

public Sgbcon()
Method Detail

sgbcon

public static void sgbcon(java.lang.String norm,
                          int n,
                          int kl,
                          int ku,
                          float[] ab,
                          int _ab_offset,
                          int ldab,
                          int[] ipiv,
                          int _ipiv_offset,
                          float anorm,
                          floatW rcond,
                          float[] work,
                          int _work_offset,
                          int[] iwork,
                          int _iwork_offset,
                          intW info)