MATLAB: Adding two polynomial(anonymous)

anonymoushomeworkhw

How do I add two anonymous function to define the polynomials.

   a=@(x) x.^3 + 6*x.^2 + 11*x +6;
>> b=@(x) x.^2 - 2*x +1;
>> syms a, syms b
>> a+b
ans=
a + b

E.g., using your original "a" and "b" functions, simply:

syms x
a(x) + b(x)

Hi,

use the

collect

command:

syms a b c x
equ = (x-a)*(x-b)+(x-c)
f = collect(equ)

gives:

f =
    x^2 + (1 - b - a)*x - c + a*b

which is the version you want sorted by powers of x - just a little bit rewritten, but following your wishes.

Best regards

Stephan

Starting from your example

A = @(x) [1 2 x; 2*x x.^2 3];

you probably realized that this command is not allowed

B = @(x)[A(x)(:,1),A(x)(:,3)]

However, you can use this command:

B = @(x)[A(x)*[1;0;0],A(x)*[0;0;1]]