Hello, I would like to convert this mathematical equation into MATLAB code.

Question

hisham mohammed 2022-12-21

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1882842-hello-i-would-like-to-convert-this-mathematical-equation-into-matlab-code

评论： John D'Errico 2022-12-21

Hello, I would like to convert this mathematical equation into MATLAB code

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John D'Errico 2022-12-21

You already got a valid answer. There is no reason to then post the same question a second time. I closed the other.

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Answer 1

Bora Eryilmaz 2022-12-21

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1882842-hello-i-would-like-to-convert-this-mathematical-equation-into-matlab-code#answer_1133857

编辑：Bora Eryilmaz 2022-12-21

在 MATLAB Online 中打开

x = rand(100,1);
N = numel(x);
num = (sum(x)/N)^2;
den = sum(abs(x.^2)) / N;
s = num / den
s = 0.7726

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Walter Roberson 2022-12-21

在 MATLAB Online 中打开

x_m = rand(100,1);
%Bora's version, valid only for reals
N = numel(x_m);
num = (sum(x_m)/N)^2;
den = sum(abs(x_m.^2)) / N;
s = num / den
s = 0.7135
%a more compact version valid only for reals
num2 = mean(x_m).^2;
den2 = mean(x_m.^2);
s2 = num2/den2
s2 = 0.7135
%analog for compact version but valid for complex as well
num3 = abs(mean(x_m)).^2;
den3 = mean(abs(x_m).^2);
s3 = num3 / den3
s3 = 0.7135