Adding 3 numbers out of 5

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MatlabGirl 2014-3-27

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评论： MatlabGirl 2014-3-27

采纳的回答： Mischa Kim

Hi,

I am trying to do a code for channel interference. I figured out everything else but I'm stuck at a few points.

I have 5 numbers stored under different names, A,B,C,D,E.

I want to take three at a time and add them together for example: A+B+C. I want matlab to do all the combinations. Is that possible? can you tell me how?

Thank you.

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Mischa Kim 2014-3-27

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编辑：Mischa Kim 2014-3-27

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Sarah, you could use

 data    = [A B C D E];
 datasum = sum(combnk(data,3),2);

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Mischa Kim 2014-3-27

编辑：Mischa Kim 2014-3-27

在 MATLAB Online 中打开

Sure.

datadif = sum(combnk(data,3)*[1 -1 -1]',2)

With the column vector, e.g. [1 -1 -1]', you can control the signs.

MatlabGirl 2014-3-27

Thanks a lot! I can't thank you enough!

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