How do I erase following data?

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HyoJae Lee
HyoJae Lee 2021-3-9
评论： HyoJae Lee 2021-3-9
I want to erase following data when data goes down under 28.
For example,
If I have this matrix
36 33 31 29 30 27 31 33 24,
I want to make the matrix into
36 33 31 29 30 NaN NaN NaN NaN.
--> when I first met a number under 28, following datas are erased like this.
Thanks.

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采纳的回答

Walter Roberson
Walter Roberson 2021-3-9
x(find(x<28,1):end) = nan ;
or
x(~cumprod(x>=28)) = nan;
  2 个评论
Mehmed Saad
Mehmed Saad 2021-3-9
oops i posted the same answer without looking
HyoJae Lee
HyoJae Lee 2021-3-9
Thanks for helping.
This is the one that I want to find.
Appreciated!

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更多回答（1 个）

Mehmed Saad
Mehmed Saad 2021-3-9
you can use find but not recommended
x = [36 33 31 29 30 27 31 33 24];
x(find(x<28,1):end) = nan
x =
36 33 31 29 30 NaN NaN NaN NaN

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