The Polynomial Toolbox for MATLAB - DCE FEL ČVUT v Praze

Degrees and
leading
coefficients
R =
2 + 3s + 6s^2 + 5s^3
In this way, new coefficients may be inserted. Thus
yields
R{5}=7
R =
2 + 3s + 6s^2 + 5s^3 + 7s^5
For polynomial matrices, it works similarly. Given
T = [ 1+s 2 s^2 s
3 4 s^3 0 ];
the coefficient matrix of s 2 may be retrieved as
T{2}
ans =
0 0 1 0
0 0 0 0
Taking coefficients and taking submatrices may be combined. So the coefficients of
the (1,3) entry of T follow as
T{:}(1,3)
ans =
0 0 1 0
The degree of a polynomial matrix is available by
deg(T)
ans =
3
The leading coefficient matrix, in our example that of
lcoef(T)
ans =
0 0 0 0
0 0 1 0
3
s may be obtained as