coeff

Arguments

Mp

Matrix of polynomials.

degrees

vector (row or column) of selected degrees (positive integers).

C

big matrix of the coefficients

Description

C=coeff(Mp) returns in a big matrix C the coefficients of the polynomial matrix Mp . C is partitioned as C=[C0,C1,...,Ck] where the Ci are arranged in increasing order k = max(degree(Mp))

C=coeff(Mp,degrees) returns the matrix of coefficients with degree in degrees.

Examples

s = %s;
w = s*rand(10,10);
determ(w)
coeff(w,1)

r = poly([0 -1+%i -1-%i],'s',"roots");
coeff(r)

r = poly([-1-%i -1+2*%i 0],'s',"roots");
coeff(r)

See also

• poly — Polynomial definition from given roots or coefficients, or characteristic to a square matrix.
• degree — degree of polynomial matrix
• inv_coeff — build a polynomial matrix from its coefficients