Need help with App designer

Currently I had a project that ive been working on for a while, I had a bunch of issues at the start that i was able to over come.

Basically the project is about making an app that uses projectile motion, so a point X is marked once the user pressed new and you input velocity and angle, and see how close the user is to the point and give them a score based on their first 5 tries

My issues right now are the following:

I am unable to have the X stay on the UIAxis when the plot of the user is inputted.

The plot of the user isnt working for some reason I am unsure of why.

And finally I am supposed to make a barrier so once the useres plot passes the X axis it stops.

I have looked around for examples but i am unable to find examples that will help me overcome my issues.

Here is my code to date:

Ive been testing out multiple ways to get it to work with no avail unfortunatly which has led me to resorting for help

        % Button pushed function: NewButton
        function NewButtonPushed(app, event)
            x1 = 0:10;
            y1 = 0:100;
            x2 = randi(length(x1));
            y2 = randi(length(y1));
            plot(app.UIAxes,x2,y2,'x','Color','red','MarkerSize',10);
            axis(app.UIAxes,[0,10,0,100]);
            app.pushed = app.pushed + 1;
            if app.pushed == 1
                clear,clc
                app.pushed = 0;
                
            end
        end

        % Button pushed function: GoButton
        function GoButtonPushed(app, event)
            %Defining Variables
            theta = app.AngleEditField.Value;
            v = app.VelocityEditField.Value;
            y0 = 1.5;
            x0 = 0;
            thetarad = theta * (pi./180);
            %Defining different velocities
            %vx = v*cosd(theta);
            %vy = v*sind(theta);
            
            %Quadtaric Formula for time
            %a = (1/2)*app.g;
            %b = vy;
            %c = y0;
            %tEnd = roots([a,b,c]);
            %tEnd = max(tEnd);
            
            %Calulation of X components
            xs = (v^2)./app.g*sin(2*thetarad);
            xt = xs ./ 100;
            
            %Defining the coordinates:
            x = x0:xs:xt;
            y = (x*tan(thetarad) - app.g/(2*(v^2)*cos(thetarad).^2)*x.^2)+y0;
            
            for i = 1:length(x)
                plot(app.UIAxis, x(i), y(i), '.');
                hold on;
                pause(0.0001);
            end


        end

Answer 1

[Adam Danz]

The hold command needs to specify the axes and it needs to be called prior to adding objects to the plot.

hold(app.UIAxes, 'on')

To limit the x values to the maximum axis limit,

min(x(i), max(xlim(app.UIAxes)))

[Amr Assar]

I have fixed a few more erros and added that however i am not getting this error:

Unrecognized method, property, or field 'UIAxis' for class 'app1'.

[Adam Danz]

"app.UIAxes" was pulled from the code in your question.

That should be replaced with whatever your uiaxis handle is.

[Amr Assar]

it is UIAxes so i dunno why its not working

[Amr Assar]

Oh my i wrote Axis my bad lmao

[Adam Danz]

Sounds like you worked it out!

If you have any further problems with this, feel free to continue the discussion here.

[Amr Assar]

Well now the plot apparently only plots one dot which is weird for some reason, Im curious if there is anything wrong with my code which is why it isnt plotting properly/ linear lines instead just one dots

[Adam Danz]

If you share your updated code and explain the order that callback functions are called (if >1 callback), I could help.

[Amr Assar]

    % This is all the code till now
    properties (Access = private)
        pushed = 0;
        g = 9.81; % Description
        
    end
    

    % Callbacks that handle component events
    methods (Access = private)

        % Button pushed function: NewButton
        function NewButtonPushed(app, event)
            x1 = 0:10;
            y1 = 0:100;
            x2 = randi(length(x1));
            y2 = randi(length(y1));
            plot(app.UIAxes,x2,y2,'x','Color','red','MarkerSize',10);
            axis(app.UIAxes,[0,10,0,100]);
            app.pushed = app.pushed + 1;
            if app.pushed == 1
                clear
                clc
                app.pushed = 0;
                
            end
        end

        % Button pushed function: GoButton
        function GoButtonPushed(app, event)
            %Defining Variables
            theta = app.AngleEditField.Value;
            v = app.VelocityEditField.Value;
            y0 = 1.5;
            x0 = 0;
            thetarad = theta * (pi./180);
            %Defining different velocities
            vx = v*cosd(theta);
            vy = v*sind(theta);
            
            %Quadtaric Formula for time
           
            
            
            
            
            
           
            %Calulation of X components
            xs = (v^2)./app.g*sin(2*thetarad);
            xt = xs/ 100;
            
            %Defining the coordinates:
            x = x0:xs:xt;
            y = (x*tan(thetarad) - app.g/(2*(v^2)*cos(thetarad).^2)*x.^2)+y0;
            
            for i = 1:length(x)
                hold(app.UIAxes, 'on')
                plot(app.UIAxes, x(i), y(i), '.');
                hold(app.UIAxes, 'on')
                pause(0.0001);
            end
            
            

[Adam Danz]

Which button is pressed first? You might need to "hold on" in the NewButtonPushed function, too.

These two lines can be removed.

if app.pushed == 1
    clear   % <-- why clear variables?
    clc     % <-- why the need to clear the command window?
    app.pushed = 0;       
end

hold on only needs executed once. There's no harm in executing it more than once but there's also no need.

for i = 1:length(x)
    hold(app.UIAxes, 'on')  %<-- move this outside of the loop or somewhere else.
    plot(app.UIAxes, x(i), y(i), '.');
    hold(app.UIAxes, 'on')  % <-- remove this
    pause(0.0001);
end

Lastly, check that your x and y values contain more than 1 coordinate.

If that doesn't solve the problem, please share your updated code.