count number with continuous numbers of 1's ?

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I had a matrix A=[0 0 1 1 1 1 0 0 0 1 1 0 0 1 0 0 1 0 0 0 1 1 1 0 0] like this , now I want a matrix B in which B(3)=1,next B(10)=1,B(14)=1 and similarly B(17)=1,B(21)=1 and rest are zeros means B gets value 1 when A first get 1.

Accepted Answer

Stephen23
Stephen23 on 31 Aug 2018
>> B = [0,diff(A)>0]
B =
0 0 1 0 0 0 0 0 0 1 0 0 0 1 0 0 1 0 0 0 1 0 0 0 0

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