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How can I make all the variables in an array 0 after the first time 0 occurs in the array
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I am trying to create a weighting function based on a set of criteria. When the weighting function is created, I get an array containing 1's and 0's. However, I am trying to force the array to be all 0's once the first 0 occurs.
For example: x = [1,1,1,1,1,0,0,1,1,0,0,0...] for which I would then like it to read x = [1,1,1,1,1,0,0,0,0,0,0,0...].
Any tips would be greatly appreciated.
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Answers (2)
Guillaume
on 20 Jan 2016
A very simple solution that only works with an array of 0 and 1 starting with 1:
x = [1,1,1,1,1,0,0,1,1,0,0,0]
cumprod(x)
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Walter Roberson
on 21 Jan 2016
I find in practice that most of the time that I want to do this, I want to work row by row; in that case I need to be sure to specify the dimension number,
cumprod(x,2)
Stephen23
on 21 Jan 2016
Without a leading one:
>> x = [0,0,1,1,1,1,1,0,0,1,1,0,0,1,0]
x =
0 0 1 1 1 1 1 0 0 1 1 0 0 1 0
>> x .* (1==cumsum(0<diff([0,x])))
ans =
0 0 1 1 1 1 1 0 0 0 0 0 0 0 0
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