A carrot a pit #M pit -Polynomial, Polyder

Polynomial

Action: performing a polynomial coefficient calculating input values to be input and output real scalar or vector.

库：Simulink / Math Operations

Polyval

Action: a polynomial calculation, i.e. evaluator polynomial at a point.

For example: B = polyval (A ,. 7);

a polynomial coefficient, a characterization polynomial; i.e., the value of the polynomial 7 position.

For example: count = 2x polynomials F ^{. 4} + 7x ^{. 3} the -X- ² -2

It may be a = [2 7 -1 -2]; x = -2: 0.01: 5;

f=polyval(a,x);

Wherein a is the parameter, x is the abscissa

E.g:

= A [2. 5. 4. 3. 1 0. 4];
X = -3: 0.01:. 3;
F = polyval (A, X);
Plot (X, F, 'LineWidth', 2);% this must be added
the xlabel ( 'X');
ylabel ( 'F');

Polyder

Action: differential polynomial, i.e. derivation, the input polynomial coefficients are the coefficients of the polynomial derivation and output.

k = polyder(p) Returns the p number of polynomial coefficients represents a guide, K ( X ) = D P ( X ) / DX .

k = polyder(a,b) Returns polynomial a and b a derivative of the product, K ( X ) = D X [ A ( X ) B ( X ) ] / DX .

[q,d] = polyder(a,b) Back polynomial a and b the derivative's, Q ( X ) D ( X ) = D X [ A ( X ) B ( X ) ] / DX .

Polyint

Role: quadrature, obtained by integrating the coefficients of the polynomial.

For example: b = polyint (a, 7);

a polynomial coefficient, a characterization polynomial; 7 points for the last one - constant term.

NOTE: The last parameter vectors are constant term, a polynomial uncertain number of items have to write 0 vector.