power of polynomial (without symbolic calculation)

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Kamuran 2015-5-28

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评论： Star Strider 2015-5-28

Hello, Is there away to get nth power of polynomial without using symbolic calculation? For example f(x)=x^2+1 and I want g(x)=(x^2+1)^3 => x^6 + 3*x^4 + 3*x^2 + 1

so without symbolic variables => f=[2 1] => g=[1 0 3 3 0 1]

Thanks

Kamuran

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Star Strider 2015-5-28

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Your ‘g’ is incorrect.

This works:

pn = [1 0 1];                   % Polynomial
res = 1;                        % Result Variable
pwr = 3;                        % Power
for k1 = 1:pwr
    res = conv(res, pn);
end
Result = res