## IB01OY

### User's confirmation of the system order

[Specification] [Arguments] [Method] [References] [Comments] [Example]

Purpose

      To ask for user's confirmation of the system order found by
      SLICOT Library routine IB01OD. This routine may be modified,
      but its interface must be preserved.

Specification

          SUBROUTINE IB01OY( NS, NMAX, N, SV, INFO )
    C     .. Scalar Arguments ..
          INTEGER            INFO, N, NMAX, NS
    C     .. Array Arguments ..
          DOUBLE PRECISION   SV( * )

Arguments

Input/Output Parameters

      NS      (input) INTEGER
              The number of singular values.  NS > 0.

      NMAX    (input) INTEGER
              The maximum value of the system order.  0 <= NMAX <= NS.

      N       (input/output) INTEGER
              On entry, the estimate of the system order computed by
              IB01OD routine.  0 <= N <= NS.
              On exit, the user's estimate of the system order, which
              could be identical with the input value of  N.
              Note that the output value of  N  should be less than
              or equal to  NMAX.

      SV      (input) DOUBLE PRECISION array, dimension ( NS )
              The singular values, in descending order, used for
              determining the system order.

Error Indicator

      INFO    INTEGER
              = 0:  successful exit;
              < 0:  if INFO = -i, the i-th argument had an illegal
                    value.

Further Comments

      None

Example

Program Text

      None

Program Data

      None

Program Results

      None

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