How can I display Z coordinate of a 3D plot, on an Edit field (numeric) in app designer.

How can I display Z coordinate of a 3D plot on edit field (numeric), when I click on a specific point on the plot, is there any way to do this on app designer?

Answer 1

[Nivedita]

Hi Abdulbagi,

I understand that you are display the Z coordinate of a 3D plot on a numeric edit field in MATLAB app designer.

You can do this in the following manner:

    methods (Access = private)        
        function output_txt = myUpdateFcn(app,info)
            % Get the datatip position
            z = info.Position(3);
            y = info.Position(2);
            x = info.Position(1);
            % Update the NumericEditField with the Z coordinate
            app.EditField.Value = z;
            % Create the datatip text
            output_txt = {sprintf('X: %.3f', x), sprintf('Y: %.3f', y), sprintf('Z: %.3f', z)};
        end
    end
    
    % Callbacks that handle component events
    methods (Access = private)
        % Code that executes after component creation
        function startupFcn(app)          
            x = [0 1 2 3 4 5 6 7 8 9];
            y = [0 1 2 3 4 5 6 7 8 9];
            z = [0 1 2 3 4 5 6 7 8 9];
            plot3(app.UIAxes, x, y, z, 'o-', 'LineWidth', 2, 'MarkerSize', 8);            
            
            dcm = datacursormode(app.UIFigure);
            dcm.Enable = 'on';
            dcm.DisplayStyle = 'datatip';
            dcm.UpdateFcn = @(src, event)myUpdateFcn(app, event);
        end
    end
        

In the “startup” function, a 3D line plot is generated using random data. Then the “datacursormode” object (“dcm”) is enabled and set to display datatips. The “UpdateFcn” property is set to the “myUpdateFcn” function, which will be called when the datatip is updated.

Inside “myUpdateFcn”, the X, Y, and Z coordinates are extracted from the “info.Position” property. The Z coordinate is then assigned to the “Value” property of the “NumericEditField” component (app.EditField.Value = z;). The datatip text is created using “sprint” to format the X, Y, and Z coordinates with three decimal places.

For more information about “datacursormode”, you can refer to the following documentation link:

https://www.mathworks.com/help/matlab/ref/matlab.graphics.shape.internal.datacursormanager.html

I hope this helps!

Regards,

Nivedita.