Matlab, how to filter a numerical vector by condition?

Question

In Matlab, I have an X vector containing N real values:

• 0.001
• 0.003
• 0.006
• 0.009
• 0.007
• 0.006

I would like to create a new vector Xb containing all the values ​​of M for X that are less than 0.005 (M <= N). How can i do this?

I tried:

Xb = X <0.005

but it gives me a vector N of values ​​0s or 1s.

Thanx

Answer 1

>> Xb = X(X < 0.005) Xb = 0.0010 0.0030 

Answer 2

What you did with the code Xb=X<0.005 was creating a mask. Simply put, it tells you which values ​​are less than 0.005, but without sorting the list. You want to sort the list by mask, which can be done as jlrcowan suggested.