How do I approximate the value of pi

Question

Dorothy Carter 2015-11-8

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https://ww2.mathworks.cn/matlabcentral/answers/253778-how-do-i-approximate-the-value-of-pi

编辑： Real Name 2015-11-9

Here is what I have so far:

function numberPI=(-1^n)*1/(2*n+1)*3^n
s=0;
n=input('enter value of n= ');
for i=1:n
    s=s+i
    numberPI
end
disp(['numberPI= ',num2str(numberPI)]);

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Dorothy Carter 2015-11-8

function numberPI s=0; n=input('enter value of n= '); for i=1:n s=s+i; numberPI=sqrt(12)* 1./((2*n+1).*(-3).^n; end disp(['numberPI= ',num2str(numberPI)]); Still an error.

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Answer 1

Real Name 2015-11-8

0
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https://ww2.mathworks.cn/matlabcentral/answers/253778-how-do-i-approximate-the-value-of-pi#answer_198983

Are you attempting to use the Leibniz series to approximate pi? That formula you have is not correct.

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Dorothy Carter 2015-11-8

编辑：Dorothy Carter 2015-11-8

What is the formula then? That was what I was given Changed script: function numberPI s=0; n=input('enter value of n= '); for i=1:n s=s+i; numberPI=sqrt(12)* 1./((2*n+1).*(-3).^n; end disp(['numberPI= ',num2str(numberPI)]); Still an error.

Real Name 2015-11-9