How to duplicate some values in vector , while each value is duplicate in different number of times?

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Kesem Ester Ozen 2022-6-14

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https://ww2.mathworks.cn/matlabcentral/answers/1740205-how-to-duplicate-some-values-in-vector-while-each-value-is-duplicate-in-different-number-of-times

评论： Jan 2022-7-5

I have a 1*48 row vector: [1 0 2 0 3 0 2 0 3 0 3.....] i want to get a 1*168 vec in a way that duplicate (1,2,3 ) four times each number and 0 is duplicate three times, and keep the order like this without changing,

Trialsorder =[1,3,1,2,3,2,1,1,1,3,2,1,3,3,1,2,1,2,3,2,2,3,3,2];

Trialsorder_temp=upsample(Trialsorder,2);

thanks you

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Jan 2022-6-14

I do not understand the procedure. What does "duplicate (1,2,3 ) four times each number and 0 is duplicate three times" mean?

Please post a short input and output example.

Kesem Ester Ozen 2022-6-14

if the vector is a=[1 0 2 0 3 0 3 0];

then i will like to get a vector like this:

>> [ 1 1 1 1 0 0 0 2 2 2 2 0 0 0 3 3 3 3 0 0 0 3 3 3 3 0 0 0 ]

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采纳的回答

David Hill 2022-6-14

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https://ww2.mathworks.cn/matlabcentral/answers/1740205-how-to-duplicate-some-values-in-vector-while-each-value-is-duplicate-in-different-number-of-times#answer_985500

在 MATLAB Online 中打开

 a=[1 0 2 0 3 0 3 0];
 d=4*(a>0)+3*(a==0);
 n=repelem(a,d);

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Jan 2022-7-5

在 MATLAB Online 中打开

Or shorter:

d = 3 + (a > 0)

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