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java.lang.Object | +----org.netlib.lapack.Dlansb
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 * ======= * * DLANSB 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 * =========== * * DLANSB returns the value * * DLANSB = ( 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 DLANSB 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, DLANSB is * set to zero. * * K (input) INTEGER * The number of super-diagonals or sub-diagonals of the * band matrix A. K >= 0. * * AB (input) DOUBLE PRECISION 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) DOUBLE PRECISION array, dimension (LWORK), * where LWORK >= N when NORM = 'I' or '1' or 'O'; otherwise, * WORK is not referenced. * * ===================================================================== * * .. Parameters ..
public Dlansb()
public static double dlansb(String norm, String uplo, int n, int k, double ab[], int _ab_offset, int ldab, double work[], int _work_offset)
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