MATLAB: Using greater than and less than

Question

I am trying to isolate a subset of data from a large set.

I want to find all the points that are less than or equal to (a) AND are greater than for equal to (b)

I have the following:

 [a,b] = find (lat(:,:) >= 44 &  <= 55)

Previously I used

 [a,b] find (lat(:,:) >= 44)

which worked perfectly. Now I receive "the unexpected matlab operator" error which it reaches the <

thanks for help,

Answer 1

 find (lat >= 44 &  lat <= 55)