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Please need help!! How to write this equation in terms of code?

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Abdullah
Abdullah 2015-10-18
评论： Faisal Muhammad 2015-10-22

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回答（2 个）

Walter Roberson
Walter Roberson 2015-10-19
x = 1 : L;
px = arrayfun(@p, 1:L);
ex = 1/L * sum(px .* x) / sum(px);
If p is vectorized then you can use
x = 1 : L;
px = p(x);
ex = 1/L * sum(px .* x) / sum(px);
Faisal Muhammad
Faisal Muhammad 2015-10-18
编辑：Walter Roberson 2015-10-19
p(x)=1+x^2 % some function
for x=1:L
ex=1/L*((p(x)*x)/(p(x))
end
By the way the function can be reduced by canceling p(x)

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