org.netlib.lapack
Class Dgecon

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

public class Dgecon
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 * ======= * * DGECON estimates the reciprocal of the condition number of a general * real matrix A, in either the 1-norm or the infinity-norm, using * the LU factorization computed by DGETRF. * * An estimate is obtained for norm(inv(A)), and the reciprocal of the * condition number is computed as * RCOND = 1 / ( norm(A) * norm(inv(A)) ). * * Arguments * ========= * * NORM (input) CHARACTER*1 * Specifies whether the 1-norm condition number or the * infinity-norm condition number is required: * = '1' or 'O': 1-norm; * = 'I': Infinity-norm. * * N (input) INTEGER * The order of the matrix A. N >= 0. * * A (input) DOUBLE PRECISION array, dimension (LDA,N) * The factors L and U from the factorization A = P*L*U * as computed by DGETRF. * * LDA (input) INTEGER * The leading dimension of the array A. LDA >= max(1,N). * * ANORM (input) DOUBLE PRECISION * If NORM = '1' or 'O', the 1-norm of the original matrix A. * If NORM = 'I', the infinity-norm of the original matrix A. * * RCOND (output) DOUBLE PRECISION * The reciprocal of the condition number of the matrix A, * computed as RCOND = 1/(norm(A) * norm(inv(A))). * * WORK (workspace) DOUBLE PRECISION array, dimension (4*N) * * IWORK (workspace) INTEGER array, dimension (N) * * INFO (output) INTEGER * = 0: successful exit * < 0: if INFO = -i, the i-th argument had an illegal value * * ===================================================================== * * .. Parameters ..


Constructor Summary
Dgecon()
           
 
Method Summary
static void dgecon(java.lang.String norm, int n, double[] a, int _a_offset, int lda, double anorm, doubleW rcond, double[] work, int _work_offset, int[] iwork, int _iwork_offset, intW info)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Dgecon

public Dgecon()
Method Detail

dgecon

public static void dgecon(java.lang.String norm,
                          int n,
                          double[] a,
                          int _a_offset,
                          int lda,
                          double anorm,
                          doubleW rcond,
                          double[] work,
                          int _work_offset,
                          int[] iwork,
                          int _iwork_offset,
                          intW info)