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Find the first incidence of 1 in a logical vector and replace all other 1s by zero

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susman
susman 2020-7-23
评论： susman 2020-7-23
I need to find the first incidence of 1 in a logical vector and replace all other 1s by zero.
For example, I have a logical vector like this: V = [ 0 1 0 0 1 0 1 ] and I need a function/code that will tell me that will yield V=[0 1 0 0 0 0 0]..
Since I am having a matrix (10000,35) size, how to run this code for each row?

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madhan ravi
madhan ravi 2020-7-23
Wanted = (cumsum(matrix, 2) == 1) .* matrix

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Walter Roberson
Walter Roberson 2020-7-23
diff([zeros(size(YourMatrix,1),1),~cumprod(~YourMatrix,2)],[],2)

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