Variable might be used before it's defined. How to workaround?

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Akbar 2018-6-21

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关闭： Akbar 2018-6-22

I am writing a matlab script. Code analyzer underlines one of the variables in red and says that, Variable might be used before it's defined. How to Workaround this problem? The variable is defined but only somewhere below. I can't define it before, it has to be defined as it is.

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Stephen23 2018-6-21

"I can't define it before, it has to be defined as it is"

Really? Why not?

http://xyproblem.info/

Akbar 2018-6-21

All right, i tried to explain the original problem here .

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回答（1 个）

Image Analyst 2018-6-21

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https://ww2.mathworks.cn/matlabcentral/answers/406811-variable-might-be-used-before-it-s-defined-how-to-workaround#answer_325725

在 MATLAB Online 中打开

Change this:

addnode = (const1 + const2)*const3;
const3 = 0.03;

to this

const3 = 0.03;
addnode = (const1 + const2)*const3;

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Akbar 2018-6-21

编辑：Akbar 2018-6-21

Its not that easy. See, const3 is extracted only somewhere in the middle of some process(extracting equations). And i am talking about hundreds of variables. The process is automatic. I cannot make the process extract const3 first. I could do it manually but its time consuming.

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