Unable to assign values to some matrix-cells

Hi, I'm currently trying to assign values in a matrix defined in a class. My problem is that the last row and last column values stay unchanged... When 'debugging' I can see that they are well traveled in the for-loop.

Thank you in advance for any suggestion.

Here is a screenshot of my matrix:

And the different pieces of code that can be useful

E = Ez(1, 5);
for x=-2:2
    for y=-2:2
      E.set(x,y,1,0);
    end;
end;

class Ez:

classdef Ez < handle

    properties
        total_timestamps
        matrices
    end;

    methods

        function obj = Ez(total_timestamps, dimensions)
            obj.total_timestamps = total_timestamps;
            for i=1:total_timestamps
                obj.matrices{i} = field(dimensions+(total_timestamps-i)*2);
            end;

        end;

        function obj = set(obj, x,y,z,t)
            if(t >= 0)
              obj.matrices{t+1}.set(x,y,z);
            end;
        end;
    end;
  end

class field:

classdef field < handle

    properties
        width;
        height;
        values;
    end;

    methods
        function obj = field(varargin)
            if(nargin == 1)
                obj.width = varargin{1};
                obj.height = varargin{1};
                obj.values = zeros(varargin{1});
            else
                obj.width = varargin{1};
                obj.height = varargin{2};
                obj.values = zeros(varargin{2},varargin{1});
            end;
        end;

        function obj = set(obj, x,y,z)
            actual_x = obj.toActualX(x);
            actual_y = obj.toActualY(y);

            if actual_x < obj.width && actual_x > 0 && actual_y < obj.height && actual_y > 0
                obj.values(actual_y,actual_x) = z;
            end; 
        end;
    end;
    methods(Access = private)
        function actual_x = toActualX(obj,x)
            if(mod(obj.width,2) ~= 0)
                actual_x = (obj.width+1)/2 + x;
            else
                actual_x = obj.width/2 +1 + x;
            end;
        end
        function actual_y = toActualY(obj,y)
            if(mod(obj.height,2) ~= 0)
                actual_y = (obj.height+1)/2 + y;
            else
                actual_y = obj.height/2 +1 + y;
            end;
        end
    end;
end

Answer 1

[Image Analyst]

Try <= :

if actual_x <= obj.width && actual_x > 0 && actual_y <= obj.height && actual_y > 0

[ata]

... I'm so stupid >_<

Thank you !