How do I get MATLAB to extract a specific value in an array?

I’ve got a 6 x 2 double that looks like this;

AA =    
                       1.5          1269.52132592592
                       2.5          1331.48519957181
                       3.5          350.503689964563
                       4.5          105.680838840683
                       5.5          33.4192155773747
                       6.5          32.0466481498415

I’m looking to identify the indices in column 1 when the data in column 2 is less than 105, and then extract the first actual value from column 1 that meets this criteria.

>> BB = (AA(:,2) < 105) results in:

BB =

       0
       0
       0
       0
       1
       1

But how do I use MATLAB to extract and save the actual value of 5.5?

Answer 1

[Azzi Abdelmalek]

idx= AA(:,2)<105
out=AA(idx,1)