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Loop for function with summation up to N-1 and N

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yuanb
yuanb 2017-11-26
回答： Youssef Ben Dhiab 2017-11-30
I have the function.
How do I write this in MATLAB?
I tried the below, but I don't think it is correct...
Vchain = 0;
for i = 1:N
Vchain = Vchain + 0.5*(D*(y(i)-y(i+1))^2 + (z(i)-z(i+1))^2) + g0*(m*z(i));
end
  2 个评论
Star Strider
Star Strider 2017-11-26
What is ‘D’?
In the image, ‘D’ looks like a function, not a constant. If it is a constant (as you have written it), the multiplication could be written outside the summation.
yuanb
yuanb 2017-11-26
In the assignment D = (70/40N) (N/m) and in the fixed part of the given code D = 70.
This was also given Vchain = Vchain + ...;
My code is not working, so something is wrong.

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回答（1 个）

Youssef Ben Dhiab
Youssef Ben Dhiab 2017-11-30
Try this :
Vchain = 0; for i = 1:N-1 Vchain = Vchain + 0.5*D*((y(i)-y(i+1))^2 + (z(i)-z(i+1))^2) + g0*(m*z(i)); end Vchain = Vchain + g0*(m*z(N));

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