File: inv_coeff.cat

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inv_coeff          Scilab Group          Scilab Function          inv_coeff
NAME
   inv_coeff - build a polynomial matrix from its coefficients
  
CALLING SEQUENCE
 [P]=inv_coeff(C,[,d,[name])
PARAMETERS
 C          : big matrix of the coefficients
            
 d          : Polynomial matrix degree. optional parameter with default
            value  d=-1+size(C,'c')/size(C,'r')
            
 name       : string giving the polynomial variable name (default value
            'x').
            
DESCRIPTION
   P=inv_coeff(Mp,k). When \fvk is compatible with Mp   size it returns a
  polynomial matrix of degree k. C=[C0,C1,...,Ck] and  P= C0 + C1*x +...
  +Ck*x^k.
  
EXAMPLE
 A=int(10*rand(2,6))
 // Building a degree 1 polynomial matrix
 P=inv_coeff(A,1)
 norm(coeff(P)-A)
 // Using default value for degree
 P1=inv_coeff(A)
 norm(coeff(P1)-A)
SEE ALSO
   poly, degree, coeff