Setting an array of a vector = NaN

2015 9 11
1 个回答
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更新时间：2015 9 11
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0 个投票

Dear Matlab community,
I am trying to set a certain array within a vector = NaN
Example:
If I have a vector with a dimension 9,1:
0.0001
0.0003
0.0001
0.0002
2
3
4
5
6
And I would like to set the elements 1-4 = NaN, to get the following output:
NaN
NaN
NaN
NaN
2
3
4
5
6
Does someone know how to set an array within the vector to NaNs? In this case, I know that element 1-4 should be NaNs.
Thank you very much!
Chris

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 采纳的回答

Star Strider
Star Strider 2015-9-11

0 个投票

This will do what you want:
V = [0.0001
0.0003
0.0001
0.0002
2
3
4
5
6];
V(V<1) = NaN

4 个评论
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Christoph Meier
Christoph Meier 2015-9-11
Thank you very much for your suggestion! I am looking for a way to set a specific array to NaNs, as my actual vector also fluctuates around zero.
Sorry for being not specific enough.
Star Strider
Star Strider 2015-9-11
What are the characteristics of your data that you want to set to NaN? It would likely require only a minor change (such as adding one of more conditions) in the logic in my code.
Christoph Meier
Christoph Meier 2015-9-11
I found a solution to the problem myself, and I will share for other users:
Setting a specific array within a vector = NaN, or any other value for that purpose:
V = [0.0001
0.0003
0.0001
0.0002
2
3
4
5
6];
V(1:4) = NaN
V = [NaN
NaN
NaN
NaN
2
3
4
5
6];
Thank you, Star Strider!
Star Strider
Star Strider 2015-9-11
My pleasure.
I thought you wanted to set specific conditions on what elements became NaN.

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