how to write the mathlab code for the sigma formula below?

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Muhammad Sam'an
Muhammad Sam'an 2020-10-7
评论： Walter Roberson 2020-10-8
suppose I have a value
Eval (X_1) = 40
Eval (X_2) = 30
Eval (X_3) = 70
Eval (X_4) = 80
Eval (X_5) = 24
Eval (X_6) = 35
Eval (X_7) = 86
Eval (X_8) = 74
Eval (X_9) = 63
Eval (X_10) = 52
F = sigma (Eval (X_ (h))) where h = 1 to h = 10
please help mathlab code for sigma F formula?
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回答（1 个）

Walter Roberson
Walter Roberson 2020-10-7
sum(Eval([X_1, X_2, X_3, X_4, X_5, X_6, X_7, X_8, X_9, X_10]))
this assumes that Eval is a vector, or that Eval is a function that is vectorized.
If Eval is a function that is not vectorized then
sum(arrayfun(@Eval, [X_1, X_2, X_3, X_4, X_5, X_6, X_7, X_8, X_9, X_10]))
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Steven Lord
Steven Lord 2020-10-8
Initialize Eval to 0 before the for count = 1:pop_size statement. This will accumulate all the values added to it in the iterations over count, count2, j, and i.
Walter Roberson
Walter Roberson 2020-10-8
For whatever reason, the poster has a requirement that they use "sigma" (sum) for this purpose, so incremental addition is not an acceptable solution to them.
I posted exact code for them at https://www.mathworks.com/matlabcentral/answers/607961-how-to-make-sigma-from-my-problem-using-math-lab-code#answer_508396

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