How to code for summation?

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Ashfaq Ahmed
Ashfaq Ahmed on 5 Oct 2022
Answered: Walter Roberson on 5 Oct 2022
Hi all,
Can anyone please tell me how can I do the coding to complete this sum?
Also, how can I write down the code that adds up one term after one term and plots them? For example,
x = -pi:0,01:pi;
plot(x,term1); hold on;
plot(x,term1+term2); hold on;
plot(x,term1+term2+term3); hold on;
until all 7 terms! Thank you so much fro your help!!

Accepted Answer

Walter Roberson
Walter Roberson on 5 Oct 2022
Your sin(x) term is constant in n, so you can move it outside the summation.
x = -pi:0.01:pi;
sx = sin(x);
factor = cumsum(2./(1:7))
factor = 1×7
2.0000 3.0000 3.6667 4.1667 4.5667 4.9000 5.1857
result = factor .* sx.';
plot(x, result)

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