Vectorizing a for loop

end

I need to vectorize this for loop, but i am having trouble. so far I have this. I do not understand what I am doing wrong. I understand the concept of what I am trying to do, but having trouble applying it.

    ni = 8;

    k=2:9;

    j=[];

    y=[];

    y(1) = 12 + 6*cos(0);

    j =cumsum((k-1)*((20)/ni));

    y(k) = 12 + 6*cos(2*pi.*j./20);

any help would be greatly appreciated.

[Matt J]

any help would be greatly appreciated.

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[Brian]

thank you. First time using the forums.

Answer 1

[Guillaume]

You're overcomplicating. I'm not sure what you're trying to do with cumsum

tstart = 0;
tend = 20;
ni = 8;

t = linspace(tstart, tend, ni+1);
y = 12 + 6*cos(2*pi*t/(tend-tstart)); %same expression as original with the index

[Brian]

ahh thank you. I was actually misunderstanding what the variable "t"'s function was in the program. This clears it up for me. Thank you again.