How to identify the position in which a value is NaN

6 次查看（过去 30 天）

Alfredo Scigliani 2022-4-20

评论： Voss 2022-4-20

I want to be able to identify the position in which a value is NaN

If I have:

x = [1 NaN 3 4 5 NaN 7 8 9 10]

In which the second and sixt position are NaN

something that gives me an answer = [ 2 , 6 ] is what I am looking for.

I usually use the "find" such as find(x==3) would return = 3 (because it is at the third position), but now I want to apply it for NaN

Not sure how that could be done, wonder if anybody can help me. Thanks in advance!

Voss 2022-4-20

编辑：Voss 2022-4-20

You can use the isnan function:

x = [1   NaN     3     4     5   NaN     7     8     9    10];
find(isnan(x))
ans = 1×2
     2     6

Yes! Thank you so much!

Voss 2022-4-20

You're welcome!

MATLAB Language Fundamentals Data Types Numeric Types Logical

在 Help Center 和 File Exchange 中查找有关 Logical 的更多信息

R2019b

Find the treasures in MATLAB Central and discover how the community can help you!

Translated by