How to genneral a repeat array

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uu tsi
uu tsi 2016-10-14
编辑： Andrei Bobrov 2016-10-14
I have a array a = [1, 2 , 3 ,4], I want to repeat every element 3 times. The result is [1,1,1,2,2,2,3,3,3,4,4,4]

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采纳的回答

Binbin Qi
Binbin Qi 2016-10-14
You can use repelem function to accomplish your question
a =
1 2 3 4
>> repelem(a, 3)
ans =
1 1 1 2 2 2 3 3 3 4 4 4

更多回答（2 个）

KSSV
KSSV 2016-10-14
k = [1, 2 , 3 ,4] ;
l = repelem(k,3)
Andrei Bobrov
Andrei Bobrov 2016-10-14
编辑：Andrei Bobrov 2016-10-14
For users MATLAB R2014b and older
out = reshape(repmat(a(:)',3,1),[],1)';
or
out = kron(a,ones(1,3));

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