Adding Zeroes and Ones into a Vector

Question

Hollis Williams 2019-5-19

0
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https://ww2.mathworks.cn/matlabcentral/answers/462944-adding-zeroes-and-ones-into-a-vector

编辑： dpb 2019-5-22

I have a 1x300 vector and would like to make it into a 1x400 vector by inserting a 0 after every third element, a 0 after every sixth element and a 1 after the ninth element and then after the twelfth element insert a 0 and repeat the pattern.

So for example if I have

0 0 1 0 1 0 1 0 0

this would become

0 0 1 0 0 1 0 0 1 0 0 1

and so on.

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Answer 1

dpb 2019-5-19

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/462944-adding-zeroes-and-ones-into-a-vector#answer_375734

编辑：dpb 2019-5-22

在 MATLAB Online 中打开

>> v=reshape([reshape(v,[],3),[0 0 1].'].',1,[])
v =
     0     0     1     0     0     1     0     0     1     0     0     1
>>

To generalize, repmat the augmentation vector as many times as needed.

>> v=reshape([reshape(v,[],3),repmat([0 0 1].',numel(v)/9,1)].',1,[])
v =
     0     0     1     0     0     1     0     0     1     0     0     1
>> 

ADDENDUM: To make the generalizaton more clear perhaps...

lenStr=3;             % length prior to insertion point
vaug=[0 0 1].';       % the augmenting vector
lenAug=numel(vaug);   % length of augmentation vector
v=reshape([reshape(v,[],lenStr),repmat(vaug,numel(v)/(lenStr*lenAug),1)].',1,[])

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Hollis Williams 2019-5-21

The code above didn't seem to give the desired result. Let's just simplify and say that I have a 1x108 vector and after every third vector I just went to inset a 1 so that I end up with a 1x144 vector, what would be the simple way of doing this?