Replace previous values with NaN
显示 更早的评论
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]
采纳的回答
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.
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Logical 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
