How to I create a function handle through recursion?

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Nathan Phelps 2020-10-26

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评论： Nathan Phelps 2020-10-26

I want to output a polynomial using values from a vector. Kind of like how you'd add recursively for a running sum, I'm trying to add terms recursively.

If my function is f(t) and A is a matrix of values, I'd want f(t) to be:

f(t) = A(1,1) + A(2,1) * t^1 + A(3,1) * t^2 + ... + A(n,1) * t^(n-1)

Edit: I forgot to add that I'm calculating the A matrix in the function, so the length isn't known, hence why I need to create the function recursively.

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Stephen23 2020-10-26

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编辑：Stephen23 2020-10-26

在 MATLAB Online 中打开

I don't see any reason why you need any recursion, basic vectorized code works just fine:

V = 0:size(A,1)-1;
F = sum(A(:,1).*t.^V(:))

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Stephen23 2020-10-26

在 MATLAB Online 中打开

>> A = randi(9,5,3)
A =
     7     8     4
     1     7     4
     3     3     7
     1     9     8
     1     1     2
>> V = 0:size(A,1)-1;
>> fun = @(t) sum(A(:,1).*t.^V(:));
>> fun(2)
ans =
    45
>> fun(5)
ans =
   837