Polynomial with nested and anonymous functions.

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Wai Han
Wai Han 2020-10-22
评论： Senal Direcksze 2021-2-11
How can I write this polynomial function without loops?
function fh = get_polynomial_handle(p)
function polynomial = poly(x)
polynomial = 0;
for i = 1 : length(p)
polynomial = polynomial + p(i) .* x.^(i-1);
end
end
fh = @poly;
end
% I try to make this function recursively, but anyway, I am having some errors in writting this function without loop.
% Can anyone explain me?
% Note: The function is not necessary to be recursive, it's just one of the ways I've thought of.

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采纳的回答

Ameer Hamza
Ameer Hamza 2020-10-22
Something like this
polynomial = sum(p .* x.^(0:numel(p)-1));
Also see polyval().
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Senal Direcksze
Senal Direcksze 2021-2-11
Thanks a lot mn. You just made my day, was stuck in this question for quite a while since yesterday. I was at 2 out of 3 errors. Even posted a forum to my lecturer for the first time last night.
P.S I tried with length & recursion but kept getting bugs for atleast one or 2 errors. Either some inputs didnt work properly or out of memory.
function pf = poly_fun(p)
if nargin < 1%Check no.of inputs
return;
end
function polynomial = poly(x)
polynomial = sum(p .* x.^(0:numel(p)-1));%numel for polynomial exponential
end
pf = @poly;
end

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