Keyboard Function Not Responding

How can I integrate the keyboard functions into this code? I tried following along a YouTube tutorial, however the creator used a joy stick and I just want to use the arrows to control the dot's x axes position. I am new to Matlab so an explanation would be great. Thank you.

% --------------------------- Dot Jump ---------------------------------- %

clear;
close all;
clc;

% --------------------------- Setup ------------------------------------- %

screensize = get(groot,'Screensize');
dim = [(screensize(3) - screensize(4))/2 0 screensize(4) screensize(4)];

size = 40;

bottom = 0;
top = bottom + 20;
v = 0;

pad1X1 = 0;
pad1X2 = 50;
pad1Y = 0;

pad2X1 = rand(1) * 45;
pad2X2 = pad2X1 + 5;
pad2Y = (rand(1) * 10.5) + bottom;

pad3X1 = rand(1)* 45;
pad3X2 = pad3X1 + 5;
pad3Y = (rand(1) * 15) + bottom;

pad4X1 = rand(1) * 45;
pad4X2 = pad4X1 + 5;
pad4Y = (rand(1) * 15) + bottom;

pad5X1 = rand(1) * 45;
pad5X2 = pad5X1 + 5;
pad5Y = (rand(1) * 15) + bottom;

padXAll = [pad1X1 pad2X1 pad3X1 pad4X1 pad5X1;...
    pad1X2 pad2X2 pad3X2 pad4X2 pad5X2];

padYAll = [pad1Y pad2Y pad3Y pad4Y pad5Y];

[padYAll ind] = sort(padYAll,2);
padXAll = padXAll(:,ind);

global xPos
xPos = 25;

yPos = .1;

dot = [xPos yPos];

xMove = 0;
yMove = 1;

plot(padXAll(:,1),[pad1Y pad1Y],'LineWidth',2)
hold on;

plot(padXAll(:,2),[pad2Y pad2Y],'LineWidth',2)
hold on;

plot(padXAll(:,3),[pad3Y pad3Y],'LineWidth',2)
hold on;

plot(padXAll(:,4),[pad4Y pad4Y],'LineWidth',2)
hold on;

plot(padXAll(:,5),[pad5Y pad5Y],'LineWidth',2)
hold on;

dot = scatter(xPos,yPos,'filled');
hold on;

xlim([0 50])
ylim([bottom top])

set(gcf,'position',dim,'KeyPressFcn',@keyboardFunction)

%pongFigure = figure('color',[.6,.6,.8],'KeyPressFcn',@keyboardFunction,'units','normal','position',[.1 .1 .8 .8]);

%pongAxes = axes(gcf,'color','white','XLim',xlim,'YLim',ylim, 'position', dim);

u = 0;
rep = 0;

bounce = 1;
oldBottom = bottom;

jumpHeight = [];

% ------------------------------ Loop ----------------------------------- %

while yPos >= bottom - 1
    
    'KeyPressFcn';@keyboardFunction;
    
    rep = rep + 1;
    
    u = u + .1;
     
    for i = 5:-1:1
        if (yPos > padYAll(i)) && ((yPos+yMove) < padYAll(i)) && ...
                ((xPos <= padXAll(2,i) && xPos >=padXAll(1,i))|| ...
                (xPos + xMove <=padXAll(2,i) && xPos + xMove >= padXAll(1,i)))
            bounce =1;
            oldBottom = bottom;
            bottom = padYAll(i);
            yPos = bottom;
            top = bottom + 20;
            
            for j = 1:i-1
                if j==1
                    padYAll(j) = (rand(1)*10.5)+bottom;
                else
                    padYAll(j) = (rand(1)*15)+bottom;
                end
                padXAll(1,j) = rand(1)*45;
                padXAll(2,j) = padXAll(1,j) + 5;
            end
            [padYAll ind] = sort(padYAll,2);
            padXAll = padXAll(:,ind);
            break
        end
    end
    jumpHeight(end+1) = yPos - bottom;
    if bounce == 1
        bounceHeight = max(jumpHeight);
        jumpHeight = [];
        screenmove = 1;
        u = .1;
        v = 15;
        yMove = (.1)*v;
        bounce = 0;
    else
        v = -(2*u) + v;
        yPos = yPos + yMove;
        yMove = (.1)*v;
    end
    
    if (xPos + xMove) > 50
        xPos = xPos + xMove - 50;
    elseif (xPos + xMove) < 0
        xPos = xPos + xMove + 50;
    else
        xPos = xPos + xMove;
    end
    
    clf
    
    plot(padXAll(:,1),[padYAll(1) padYAll(1)],'LineWidth',2);
    hold on;
    
    plot(padXAll(:,2),[padYAll(2) padYAll(2)],'LineWidth',2);
    hold on;
    
    plot(padXAll(:,3),[padYAll(3) padYAll(3)],'LineWidth',2);
    hold on;
    
    plot(padXAll(:,4),[padYAll(4) padYAll(4)],'LineWidth',2);
    hold on;
    
    plot(padXAll(:,5),[padYAll(5) padYAll(5)],'LineWidth',2);
    hold on;
    
    scatter(xPos,yPos,'filled')
    xlim([0 50])
    title('DotJump')
    lvl = compose(['Height: ' num2str(bottom)]);
    annotation('textbox',[.5 .5 .3 .3],'String', lvl,'FitBoxToText','on')
    
    if yMove <= 0
        screenmove = 0;
    end
    if (screenmove == 1) && ((oldBottom + yMove) < bottom)
        ylim([oldBottom + yMove oldBottom + yMove + 20])
        oldBottom = oldBottom + 20;
    else
        ylim([bottom-.1 top-.1])
    end
    
    hold on

    if rep == 1
        pause(5)
    end
    
    pause(.01)


end 

% --------------------------- Functions --------------------------------- %
function keyboardFunction(~,event)
global xPos
switch event.Key
    case 'leftarrow'
        xPos = xPos - 5;
    case 'rightarrow'
        xPos = xPos + 5;
end
end

Answer 1

[Tommy]

Add a drawnow before your pause(.01) to flush the graphics queue.

Or use a longer pause, but of course that messes with the animation frame rate.

See this answer.

[Nicholas Gonzales]

Thank you very much. The draw now worked