How do I erase following data?

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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.

Walter Roberson 2021-3-9

x(find(x<28,1):end) = nan ;

x(~cumprod(x>=28)) = nan;

Mehmed Saad 2021-3-9

oops i posted the same answer without looking

HyoJae Lee 2021-3-9

Thanks for helping.

This is the one that I want to find.

Appreciated!

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

HyoJae Lee 2021-3-9

Thanks for help!

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