Iterating in function handles

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Harry Li
Harry Li 2022-3-13
评论： Harry Li 2022-3-13
I am trying to solve an SDE (using SDETools). Here is a simplified version of the SDE.
I need to input function handles, f and g, for the 'dt' and 'dw' components respectively. For example,
g = @(t, x) sig;
would define the function handle for g given a pre-defined array sig. Now, I would like to define the function handle , where are coefficients that depend on i and j. For the purpose of this example, assume that. How can I define a single function handle that returns a column vector that does what I want?
If it helps, when , I was able to do
f = @(t, x) mean(x) - x;
But I'm stuck on how to adapt this to include the . I think I need to iterate over i and j inside the function, but don't know if this is correct. Thanks in advance.
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Torsten
Torsten 2022-3-13
编辑：Torsten 2022-3-13
Yes, but the function handle can point to a function.
f = @(t,x)fun(t,x)
%Call SDE with function handle f
function res = fun(t,x)
% Calculate whatever you like
res = something;
end
Harry Li
Harry Li 2022-3-13
That makes sense, thank you.

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