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

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hisham mohammed
hisham mohammed 2022-12-21
评论： John D'Errico 2022-12-21
Hello, I would like to convert this mathematical equation into MATLAB code

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回答（1 个）

Bora Eryilmaz
Bora Eryilmaz 2022-12-21
编辑：Bora Eryilmaz 2022-12-21
Ran in:
x = rand(100,1);
N = numel(x);
num = (sum(x)/N)^2;
den = sum(abs(x.^2)) / N;
s = num / den
s = 0.7726
  1 个评论
Walter Roberson
Walter Roberson 2022-12-21
Ran in:
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
What you can get away with depends on whether there might be complex numbers involved.

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