Confused how to run a loop for each individual value of Nd1?

Question

Kevin Nelson 2022-10-5

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https://ww2.mathworks.cn/matlabcentral/answers/1817695-confused-how-to-run-a-loop-for-each-individual-value-of-nd1

回答： Eric Delgado 2022-10-5

Nd1 = [5, 10, 50, 100, 500, 1000];

trials2 = 100;

sigma = 4;

samplevar = zeros(Nd1,1);

samplevarbias = zeros(Nd1,1);

for i=1:Nd1

uncorrected = (1/Nd1)*(sum(4^2 * 0^2));

corrected = (1./Nd1 - 1)*(sum((4-0)^2));

end

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Kevin Nelson 2022-10-5

The entire code doesn't really matter, but what I'm confused about is specifically how to run a loop for each individual value of Nd1. For example, if I set Nd1 as 1000, the loop will run that loop from 1 to 1000, but when I set individual values for Nd1 as shown above, the code doesn't understand what to do and neither do I. Above is just a snippet of my code, but is there something I should change to get what I'm asking for? Thanks

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Answer 1

Eric Delgado 2022-10-5

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I don't know if it is exactaly what you want, but...

Nd1 is an array, so you have to acess every element in your array to do the calculation.

Nd1 = [5, 10, 50, 100, 500, 1000];
uncorrected = zeros(numel(Nd1),1);
corrected   = zeros(numel(Nd1),1);
for i=1:numel(Nd1)
    uncorrected(i) = (1/Nd1(i))*(sum(4^2 * 0^2));
    corrected(i)   = (1./Nd1(i) - 1)*(sum((4-0)^2));
end