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I need to add and multiply a vetor

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Luis
Luis 2022-12-13
评论： Luis 2022-12-26
Given a vector u = (u1 + u2 + ... + un) make a funcition which gives u1*u2+u2*u3+...+un-1*un. Apply it to the vector u = cos(0:pi/20:pi)

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DGM
DGM 2022-12-13
Ran in:
You mean something like this?
u = cos(0:pi/20:pi);
v = sum(u(2:end) .* u(1:end-1))
v = 9.8769

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Bora Eryilmaz
Bora Eryilmaz 2022-12-13
编辑：Bora Eryilmaz 2022-12-13
Ran in:
This looks like the dot product of the subvectors u(1:n-1) and u(2:end):
u = cos(0:pi/20:pi); % Create the vector
p = u(1:end-1) * u(2:end)' % Use the dot product.
p = 9.8769

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