How to get data based on first and second column

Hallo, I have matrix (793576x3) that consist of x,y,z, which are x = longitude and y = latitude and z = depth.

I want to get z data only for coordinate x,y (92,8.25),(92.5,8.0).., and so on that means +0.25 for x coordinate and -25 for y coordinate. so the results should be

x y z

92 8.25 -

92.25 8.0 -

92.50 7.75 -

Answer 1

[dpb]

mxx=max(A(:,1));                     % max X coordinate in array
ix=ismember(A(:,1),[92:0.025:mxx]);  % locations in A of desired values
B=A(ix,:):                           % those elements of A

[dpb]

--Answer moved to Comments. dpb--

Thank you very much for your answer. much appriciated

[dpb]

Glad to help; NB: left off the max function on first code line originally...