Output of a vector which excludes the entries of the second vector

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Feng Cheng Chang 2012-12-1

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https://ww2.mathworks.cn/matlabcentral/answers/55374-output-of-a-vector-which-excludes-the-entries-of-the-second-vector

Hello,

Problem: Given two distinct integer vectors p and q. I'd like to get a new vector r, that is p excluding the entries of q.

For example,

p = [1 2 3 4 5 6 7 8], q = [2 5 7 9], then r = [1 3 4 6 8].

Hope to have a code in a singer line. Thanks.

采纳的回答

Azzi Abdelmalek 2012-12-1

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https://ww2.mathworks.cn/matlabcentral/answers/55374-output-of-a-vector-which-excludes-the-entries-of-the-second-vector#answer_67198

编辑：Azzi Abdelmalek 2012-12-1

在 MATLAB Online 中打开

 p = [1 2 3 4 5 6 7 8],
 q = [2 5 7 9], 
 out=p(~ismember(p,q))

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Azzi Abdelmalek 2012-12-1

I suggest Walter's answer

Feng Cheng Chang 2012-12-1

Thanks for your suggestion.

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更多回答（1 个）

Walter Roberson 2012-12-1

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/55374-output-of-a-vector-which-excludes-the-entries-of-the-second-vector#answer_67199

在 MATLAB Online 中打开

r = setdiff(p, q);

Note that the two answers are slightly different, having to do with the ordering of the outputs if the first vector is not sorted. setdiff() also has a 'stable' option to get the outputs in the original order.

Matt Fig 2012-12-1

Not in 2011b....

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