Replace previous values with NaN
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I have a vector with some numbers. if any of the number comes NaN then all the number before NaN will be NaN.
ex. A=[1 2 3 4 NaN 5 6 8 6]
then I want to get, A=[NaN NaN NaN NaN NaN 5 6 8 6]
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DGM
2021-3-21
This can be done using isnan() and find():
A=[1 2 3 4 NaN 5 6 8 6 1 2 3 4 NaN 5 6 8 6];
nanidx=find(isnan(A),1,'last');
A(1:nanidx)=NaN
The result will be NaN up to the last instance of NaN in the original array:
A =
NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN 5 6 8 6
There might be some considerations to make if A ever becomes 2D, depending on how you want to handle things.
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