How to save corresponding elements in a matrix?

If I have this matrix:

 A=[1, 2;
    4, 5;
    6, 6]

How would I pull elements from the first column that are greater than 3 but save the corresponding elements in the second column to a new matrix? For reference, these columns have been abbreviated. The second column is time data, and the first is motion. I want to save the times when the motion data exceeded a set threshold.

Answer 1

[Azzi Abdelmalek]

B=A(A(:,1)>3,:)

If you want to save just the second column

B=A(A(:,1)>3,2)

You need to read some basics http://www.mathworks.com/help/matlab/getting-started-with-matlab.html