extended by org.netlib.lapack.SLANSB

public class SLANSB
extends java.lang.Object

SLANSB is a simplified interface to the JLAPACK routine slansb.
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 with any questions.

* .. * * Purpose * ======= * * SLANSB returns the value of the one norm, or the Frobenius norm, or * the infinity norm, or the element of largest absolute value of an * n by n symmetric band matrix A, with k super-diagonals. * * Description * =========== * * SLANSB returns the value * * SLANSB = ( max(abs(A(i,j))), NORM = 'M' or 'm' * ( * ( norm1(A), NORM = '1', 'O' or 'o' * ( * ( normI(A), NORM = 'I' or 'i' * ( * ( normF(A), NORM = 'F', 'f', 'E' or 'e' * * where norm1 denotes the one norm of a matrix (maximum column sum), * normI denotes the infinity norm of a matrix (maximum row sum) and * normF denotes the Frobenius norm of a matrix (square root of sum of * squares). Note that max(abs(A(i,j))) is not a matrix norm. * * Arguments * ========= * * NORM (input) CHARACTER*1 * Specifies the value to be returned in SLANSB as described * above. * * UPLO (input) CHARACTER*1 * Specifies whether the upper or lower triangular part of the * band matrix A is supplied. * = 'U': Upper triangular part is supplied * = 'L': Lower triangular part is supplied * * N (input) INTEGER * The order of the matrix A. N >= 0. When N = 0, SLANSB is * set to zero. * * K (input) INTEGER * The number of super-diagonals or sub-diagonals of the * band matrix A. K >= 0. * * AB (input) REAL array, dimension (LDAB,N) * The upper or lower triangle of the symmetric band matrix A, * stored in the first K+1 rows of AB. The j-th column of A is * stored in the j-th column of the array AB as follows: * if UPLO = 'U', AB(k+1+i-j,j) = A(i,j) for max(1,j-k)<=i<=j; * if UPLO = 'L', AB(1+i-j,j) = A(i,j) for j<=i<=min(n,j+k). * * LDAB (input) INTEGER * The leading dimension of the array AB. LDAB >= K+1. * * WORK (workspace) REAL array, dimension (LWORK), * where LWORK >= N when NORM = 'I' or '1' or 'O'; otherwise, * WORK is not referenced. * * ===================================================================== * * .. Parameters ..

Constructor Summary
Method Summary
static float SLANSB(java.lang.String norm, java.lang.String uplo, int n, int k, float[][] ab, float[] work)
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail


public SLANSB()
Method Detail


public static float SLANSB(java.lang.String norm,
                           java.lang.String uplo,
                           int n,
                           int k,
                           float[][] ab,
                           float[] work)