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.TH inv_coeff 1 "April 1993" "Scilab Group" "Scilab Function"
.so ../sci.an
.SH NAME
inv_coeff - build a polynomial matrix from its coefficients
.SH CALLING SEQUENCE
.nf
[P]=inv_coeff(C,[,d,[name])
.fi
.SH PARAMETERS
.TP 10
C
: big matrix of the coefficients
.TP 10
d
: Polynomial matrix degree. optional parameter with default value
\fVd=-1+size(C,'c')/size(C,'r')\fR
.TP 10
name
: string giving the polynomial variable name (default value \fV'x'\fR).
.SH DESCRIPTION
\fVP=inv_coeff(Mp,k)\fR. When \fvk\fR is compatible with \fVMp\fR
size it returns a polynomial matrix of degree k. \fVC=[C0,C1,...,Ck]\fR and
\fVP= C0 + C1*x +... +Ck*x^k\fR.
.SH EXAMPLE
.nf
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)
.fi
.SH SEE ALSO
poly, degree, coeff
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