Sum of a function

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Olawale Kazeem 2019-6-24

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评论： Himanshu Rai 2019-6-25

采纳的回答： Himanshu Rai

Hello everyone, I am stucked on how to write particular code for a Nash-Cournout oligopolistic equilibrium problem. I have written everything correctly and it ran successfully. The only situation I am in presently is trying to vary a particular step. To be more precise

I need code for the following:

is random for every

is random for every

and

is random for every

. I need to execute the following Quad program $c_j(x_j) = \frac{1}{2}x{_j}^{'} P_j x_j+ {q_j}^{'} x{_j}$. I will be glad if I can get a prompt help on this.

https://www.mathworks.com/matlabcentral/answers/uploaded_files/226241/Screenshot_20190625-093751.png

Thanks

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采纳的回答

Himanshu Rai 2019-6-25

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https://ww2.mathworks.cn/matlabcentral/answers/468693-sum-of-a-function#answer_380639

编辑：Himanshu Rai 2019-6-25

在 MATLAB Online 中打开

The expression below should solve your problem. Also write questions properly -

would be scalar, so c is a vector. P and x are normal matrices, and q is a vector. This should solve your problem.

PS - Also update your question, and attach the image file there

c = x' * P * x / 2 + q' * x

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Olawale Kazeem 2019-6-25

We need q_j to be 1by 3 as well

Himanshu Rai 2019-6-25

Well if

is

, then

can't be calculated, because again the matrices are incompatible

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Olawale Kazeem 2019-6-25

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/468693-sum-of-a-function#answer_380663

Screenshot_20190625-093751.png

I just checked the mistake, hopefully I have not disturbed you too much. I am attaching a file that contains what I need.

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Olawale Kazeem 2019-6-25

I suppose my definition of x is wrong. I defined

;

; and

; . $c = 0.5*x'*P*x+q'*x$. This gives a

matrix.

Himanshu Rai 2019-6-25

This is not x, but

.

is a vector but x is a matrix. And what you denote by c above is actually

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