Setting an array of a vector = NaN

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

Answer 1

[Star Strider]

This will do what you want:

V = [0.0001
    0.0003
    0.0001
    0.0002
    2
    3
    4
    5
    6];

V(V<1) = NaN

[Christoph Meier]

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]

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]

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]

My pleasure.

I thought you wanted to set specific conditions on what elements became NaN.