How to repeat an array based on another array

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Mohammed Alshehri
Mohammed Alshehri 2017-1-15
回答： Stephen23 2017-1-15
Greetings
I am trying to repeat an array based on another array e.g
Repeat element of array A based on the elements of array B
A= [ 1 2 3 4 ]
B= [ 2 3 1 2]
the resulted array should be ( first element of A that is 1 repeated 2 times which is the first element of array B and so on )
C= [ 1 1 2 2 2 3 4 4 ]

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采纳的回答

the cyclist
the cyclist 2017-1-15
Use repelem.
C = repelem(A,B)

更多回答（1 个）

Stephen23
Stephen23 2017-1-15
For MATLAB before R2015a:
>> A = [1,2,3,4];
>> B = [2,3,1,2];
>> cell2mat(arrayfun(@(a,b)repmat(a,1,b),A,B,'uni',0))
ans =
1 1 2 2 2 3 4 4

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