Distinguish random points per grid

Is there any way to make different groups of points that belongs to different grid?

For example, in this figure, how we can notify that which point belong to which grid? and make set for each grid?

Answer 1

[KSSV]

Refer this link for similar question: https://in.mathworks.com/matlabcentral/answers/300553-how-to-find-coordinates-of-a-point-at-where-4-grids-meets-each-other

[Asim Ismail]

I think that is different, if you see my code it will give you some view. What i want is to make groups of points for each grid.

 a=rand(2,100)*100;
scatter(a(1,:),a(2,:))
grid on
set(gca,'xtick',[0:33.33333:100])
set(gca,'ytick',[0:33.33333:100])

[KSSV]

No it is the same....it will separate the points depending on the grid.

[Asim Ismail]

Then how can we get data set for each grid out of that algorithm?