org.netlib.lapack
Class Dlangt
java.lang.Object
org.netlib.lapack.Dlangt
public class Dlangt
- 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
* =======
*
* DLANGT 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
* ===========
*
* DLANGT returns the value
*
* DLANGT = ( 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 consistent matrix no
*
* Arguments
* =========
*
* NORM (input) CHARACTER*1
* Specifies the value to be returned in DLANGT as described
* above.
*
* N (input) INTEGER
* The order of the matrix A. N >= 0. When N = 0, DLANGT is
* set to zero.
*
* DL (input) DOUBLE PRECISION array, dimension (N-1)
* The (n-1) sub-diagonal elements of A.
*
* D (input) DOUBLE PRECISION array, dimension (N)
* The diagonal elements of A.
*
* DU (input) DOUBLE PRECISION array, dimension (N-1)
* The (n-1) super-diagonal elements of A.
*
* =====================================================================
*
* .. Parameters ..
Method Summary |
static double |
dlangt(java.lang.String norm,
int n,
double[] dl,
int _dl_offset,
double[] d,
int _d_offset,
double[] du,
int _du_offset)
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Dlangt
public Dlangt()
dlangt
public static double dlangt(java.lang.String norm,
int n,
double[] dl,
int _dl_offset,
double[] d,
int _d_offset,
double[] du,
int _du_offset)