extended by org.netlib.lapack.SLANGT

public class SLANGT
extends java.lang.Object

SLANGT is a simplified interface to the JLAPACK routine slangt.
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 * ======= * * SLANGT returns the value of the one norm, or the Frobenius norm, or * the infinity norm, or the element of largest absolute value of a * real tridiagonal matrix A. * * Description * =========== * * SLANGT returns the value * * SLANGT = ( 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 SLANGT as described * above. * * N (input) INTEGER * The order of the matrix A. N >= 0. When N = 0, SLANGT is * set to zero. * * DL (input) REAL array, dimension (N-1) * The (n-1) sub-diagonal elements of A. * * D (input) REAL array, dimension (N) * The diagonal elements of A. * * DU (input) REAL array, dimension (N-1) * The (n-1) super-diagonal elements of A. * * ===================================================================== * * .. Parameters ..

Constructor Summary
Method Summary
static float SLANGT(java.lang.String norm, int n, float[] dl, float[] d, float[] du)
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail


public SLANGT()
Method Detail


public static float SLANGT(java.lang.String norm,
                           int n,
                           float[] dl,
                           float[] d,
                           float[] du)