MATLAB: Take the array which is less than 3

arrayfindmatrix

I have this marix

A= [ 1 0 1 0 1 0 1 1 1 1 1 1 0 0 0 1 0 1 3 3 3]

How can I take only value less than 3? The result should be :

A=[1 0 1 0 1 0 1 1 1 1 1 1 0 0 0 1 0 1]

I use this code , but its wrong

B=A(1:find(A==3)(1))

A(A<3)

Try this:

A = [0 1 4 2; 1 2 0 3; 0 1 1 0; 1 0 3 1]
A(A<3) = 0 % Must come first!
A(A>3) = 1

In the command widnow:

A =
     0     0     1     0
     0     0     0     3
     0     0     0     0
     0     0     3     0

ismember(a, b)