org.netlib.lapack
Class Sstev

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

public class Sstev
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 * ======= * * SSTEV computes all eigenvalues and, optionally, eigenvectors of a * real symmetric tridiagonal matrix A. * * Arguments * ========= * * JOBZ (input) CHARACTER*1 * = 'N': Compute eigenvalues only; * = 'V': Compute eigenvalues and eigenvectors. * * N (input) INTEGER * The order of the matrix. N >= 0. * * D (input/output) REAL array, dimension (N) * On entry, the n diagonal elements of the tridiagonal matrix * A. * On exit, if INFO = 0, the eigenvalues in ascending order. * * E (input/output) REAL array, dimension (N) * On entry, the (n-1) subdiagonal elements of the tridiagonal * matrix A, stored in elements 1 to N-1 of E; E(N) need not * be set, but is used by the routine. * On exit, the contents of E are destroyed. * * Z (output) REAL array, dimension (LDZ, N) * If JOBZ = 'V', then if INFO = 0, Z contains the orthonormal * eigenvectors of the matrix A, with the i-th column of Z * holding the eigenvector associated with D(i). * If JOBZ = 'N', then Z is not referenced. * * LDZ (input) INTEGER * The leading dimension of the array Z. LDZ >= 1, and if * JOBZ = 'V', LDZ >= max(1,N). * * WORK (workspace) REAL array, dimension (max(1,2*N-2)) * If JOBZ = 'N', WORK is not referenced. * * INFO (output) INTEGER * = 0: successful exit * < 0: if INFO = -i, the i-th argument had an illegal value * > 0: if INFO = i, the algorithm failed to converge; i * off-diagonal elements of E did not converge to zero. * * ===================================================================== * * .. Parameters ..


Constructor Summary
Sstev()
           
 
Method Summary
static void sstev(java.lang.String jobz, int n, float[] d, int _d_offset, float[] e, int _e_offset, float[] z, int _z_offset, int ldz, float[] work, int _work_offset, intW info)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Sstev

public Sstev()
Method Detail

sstev

public static void sstev(java.lang.String jobz,
                         int n,
                         float[] d,
                         int _d_offset,
                         float[] e,
                         int _e_offset,
                         float[] z,
                         int _z_offset,
                         int ldz,
                         float[] work,
                         int _work_offset,
                         intW info)