Problem 44951. Verify Law of Large Numbers

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Tavish Pattanayak 2020-5-7

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https://ww2.mathworks.cn/matlabcentral/answers/523687-problem-44951-verify-law-of-large-numbers

评论： Tavish Pattanayak 2020-5-7

function dice_diff = loln(N)
add = 0; mean = 0; mean1 = 0;add1=0;
for c=1:1*exp(8)
    num = randi(N);
    add = add + num;
end
mean = add/(1*exp(8))
for c=1:N
    add1=add1+c;
end
mean1=add1/N
    dice_diff = mean-mean1
end

The code works fine but the result is not as expected. Could anyone tell the reason?

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采纳的回答

Walter Roberson 2020-5-7

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If you want 2980 iterations then why not use 2980 instead of exp(8) ?

mean = add/(1*exp(8))

Incorrect. You do an integer number of iterations, 2980, but you divide by exp(8) which is about 2980.96 so you get the wrong mean() value. You sould be dividing by the number of iterations you do. Or you should use mean()