Taking out entries of a Vector to make a new Vector

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Tom 2019-8-11

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https://ww2.mathworks.cn/matlabcentral/answers/475753-taking-out-entries-of-a-vector-to-make-a-new-vector

评论： Stephen23 2019-8-11

I have a 400 x 1 column vector, is it possible to 'splice' out every 4-th entry of that vector to end up with a 100 x 1 column vector, plus a 300 x 1 column vector left over from the original vector? Let me know if this doesn't make sense and I can explain further.

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Answer 1

Stephen23 2019-8-11

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https://ww2.mathworks.cn/matlabcentral/answers/475753-taking-out-entries-of-a-vector-to-make-a-new-vector#answer_387150

编辑：Stephen23 2019-8-11

在 MATLAB Online 中打开

Where V is your vector:

X = V(4:4:end);
Y = V;
Y(4:4:end) = [];

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Tom 2019-8-11

This seems to remove the first and the fifth entry and so on, I need to remove the fourth, the eighth, and so on.

Stephen23 2019-8-11

"This seems to remove the first and the fifth entry and so on, I need to remove the fourth, the eighth, and so on."

Yes it did, because you did not specify the starting element. However changing the code is pretty trivial: I changed my answer from starting at element 1 to starting at element 4.

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