Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## org.netlib.lapack
Class Dstev

    java.lang.Object
      org.netlib.lapack.Dstev

    public class Dstev

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
     *  =======
     *
     *  DSTEV 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) DOUBLE PRECISION 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) DOUBLE PRECISION array, dimension (N-1)
     *          On entry, the (n-1) subdiagonal elements of the tridiagonal
     *          matrix A, stored in elements 1 to N-1 of E.
     *          On exit, the contents of E are destroyed.
     *
     *  Z       (output) DOUBLE PRECISION 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) DOUBLE PRECISION 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
`Dstev()`

Method Summary
`static void` | `dstev(java.lang.String jobz, int n, double[] d, int _d_offset, double[] e, int _e_offset, double[] z, int _z_offset, int ldz, double[] 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

### Dstev

    public Dstev()

Method Detail

### dstev

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

Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD