File: coff.cat

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coff(1)                        Scilab Function                        coff(1)
NAME
  coff - resolvent (cofactor method)

CALLING SEQUENCE
  [N,d]=coff(M [,var])

PARAMETERS

  M    : square real matrix

  var  : character string

  N    : polynomial matrix (same size as M)

  d    : polynomial (characteristic polynomial poly(A,'s'))

DESCRIPTION
  coff computes R=(s*eye-M)^-1 for M a real matrix. R is given by N/d.

  N = numerator polynomial matrix.

  d = common denominator.

  var character string ('s' if omitted)

EXAMPLE
  M=[1,2;0,3];
  [N,d]=coff(M)
  N/d
  inv(%s*eye-M)

SEE ALSO
  coffg, ss2tf, nlev, poly