org.netlib.lapack
Class Sppcon

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

public class Sppcon
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 * ======= * * SPPCON estimates the reciprocal of the condition number (in the * 1-norm) of a real symmetric positive definite packed matrix using * the Cholesky factorization A = U**T*U or A = L*L**T computed by * SPPTRF. * * An estimate is obtained for norm(inv(A)), and the reciprocal of the * condition number is computed as RCOND = 1 / (ANORM * norm(inv(A))). * * Arguments * ========= * * UPLO (input) CHARACTER*1 * = 'U': Upper triangle of A is stored; * = 'L': Lower triangle of A is stored. * * N (input) INTEGER * The order of the matrix A. N >= 0. * * AP (input) REAL array, dimension (N*(N+1)/2) * The triangular factor U or L from the Cholesky factorization * A = U**T*U or A = L*L**T, packed columnwise in a linear * array. The j-th column of U or L is stored in the array AP * as follows: * if UPLO = 'U', AP(i + (j-1)*j/2) = U(i,j) for 1<=i<=j; * if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = L(i,j) for j<=i<=n. * * ANORM (input) REAL * The 1-norm (or infinity-norm) of the symmetric matrix A. * * RCOND (output) REAL * The reciprocal of the condition number of the matrix A, * computed as RCOND = 1/(ANORM * AINVNM), where AINVNM is an * estimate of the 1-norm of inv(A) computed in this routine. * * WORK (workspace) REAL array, dimension (3*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
Sppcon()
           
 
Method Summary
static void sppcon(java.lang.String uplo, int n, float[] ap, int _ap_offset, float anorm, floatW rcond, float[] 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

Sppcon

public Sppcon()
Method Detail

sppcon

public static void sppcon(java.lang.String uplo,
                          int n,
                          float[] ap,
                          int _ap_offset,
                          float anorm,
                          floatW rcond,
                          float[] work,
                          int _work_offset,
                          int[] iwork,
                          int _iwork_offset,
                          intW info)