How to take from array elements that must fulfil a specific condition?

I have an array A and I need to create a new one with every previous number from A if the next number is less than certain known value M.

I'm just starting with Matlab and don't have any idea how to filter my array A this way.

Thank you in advance for your help.

Answer 1

[Davide Masiello]

Let's create a 1x10 array of values comprised between 0 and 1.

A = rand(1,10);

Let's assume you want to filter off all the values of A which are less than 0.5. You can do it like this:

A1 = A(A>=0.5);

I ran it on my pc, getting the following example result:

A  = [0.0154    0.0430    0.1690    0.6491    0.7317    0.6477    0.4509    0.5470    0.2963    0.7447]
A1 = [0.6491    0.7317    0.6477    0.5470    0.7447]