1.0 for I = 1,...,N.
          = 'P':  permute only;
          = 'S':  scale only;
          = 'B':  both permute and scale.

</PRE>
<B>Input/Output Parameters</B>
<PRE>
  N       (input) INTEGER
          The order of matrices A and B.  N &gt;= 0.

  THRESH  (input) DOUBLE PRECISION
          If JOB = 'S' or JOB = 'B', and THRESH &gt;= 0, threshold
          value for magnitude of the elements to be considered in
          the scaling process: elements with magnitude less than or
          equal to THRESH*