'
          or 'N', N must be non-negative. The values N &gt;= NOBR,
          or N = 0, are not acceptable if INIT = 'L' or 'B'.

  NN      (input) INTEGER
          The number of neurons which shall be used to approximate
          the nonlinear part.  NN &gt;= 0.

  ITMAX1  (input) INTEGER
          The maximum number of iterations for the initialization of
          the static nonlinearity.
          This parameter is ignored if INIT is 'N' or 'L'.
          Otherwise, ITMAX1 &gt;= 0.

  ITMAX2  (input)