How can I make part of the interface disappear when changing selection in drop-down menu

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I will start by apologising for the eventual poor quality of the code. I was working on a project, and part of it involves displaying different graphs, by selecting them from a drop-down menu. One of the graphs has editable Amplitude, frequency, etc, while the other should not. The problem I am facing is that if I first select the graph with adjustable parameters, whenever I choose the other one, the textboxes and editable boxes from the first graph are there. How can I make it so the Cardioid graph doesn't show the interface from the Sine?

^^this is how it should look like.

^^this it the other graph

^^this is what happens if I first select the Sine, and then the Cardioid

Here is my code:

function Extra
Fig=figure('Name','Extra',...
    'Position' , [300 75 999 700],...
    'Color', [  0.8941    1.0000    0.7686],...
    'NumberTitle','off'); 
uicontrol('Style','popupmenu',...
          'Units','normalized',...
          'String',{'1','2','<3'},...
          'Position',[0.8 0.8 0.2 0.2],...
          'Callback',['caz=','get(gco,''Value'');desen(caz);']);
          
uicontrol('Style','pushbutton',...
    'Units','normalized',...
    'Position',[0.4 0.05 0.2 0.05],...
    'BackgroundColor',[ 1.0000    0.9686    0.8510],...
    'String','Close',...
    'Callback','close;');
 
   
end
function desen(caz)
if (caz == 3)
    
 
   subplot('position',[0.1 0.2 0.8 0.7]);
    t = linspace(-pi,pi, 350);
    X =  t .* sin( pi * .872*sin(t)./t);
    Y = -abs(t) .* cos(pi * sin(t)./t);
    plot(X,Y);
    %fill(X, Y, 'r');
    %axis square;
    %set(gcf, 'Position', get(0,'Screensize')); 
    title('Cardioid', 'FontSize', 16);
elseif (caz == 2)
    A = 10;
    f = 50;
    N = 4;
    T = 1/f;
    t = 0:T/100:N*T;
    x=A*sin(2*pi*f*t); 
uicontrol('Style','text',...
    'Units','normalized',...
    'Position',[0.9 0.83 0.08 .05],...
    'Backgroundcolor',[0.5 0.5 0.9],...
    'String','A');
uicontrol('Style','edit',...
    'Units','normalized',...
    'Position',[0.9 0.80 0.08 .05],...
    'String','A',...
    'Callback',['A=','str2num(get(gco,''String''));sine(A,f,N);']);
uicontrol('Style','text',...
    'Units','normalized',...
    'Position',[0.9 0.68 0.08 .05],...
    'Backgroundcolor',[0.5 0.5 0.9],...
    'String','f');
uicontrol('Style','edit',...
    'Units','normalized',...
    'Position',[0.9 0.64 0.08 .05],...
    'String','f',...
    'Callback',['f=','str2num(get(gco,''String''));sine(A,f,N);']);
uicontrol('Style','text',...
    'Units','normalized',...
    'Position',[0.9 0.53 0.08 .05],...
    'Backgroundcolor',[0.5 0.5 0.9],...
    'String','N');
uicontrol('Style','edit',...
    'Units','normalized',...
    'Position',[0.9 0.50 0.08 .05],...
    'String','N',...
    'Callback',['N=','str2num(get(gco,''String''));sine(A,f,N);']);
uicontrol('Style','pushbutton',...
    'Units','normalized',...
    'Position',[0.715 0.05 0.2 0.05],...
    'String','Reset to Initial Values',...
    'FontName','Arial',...
    'Callback','sine(10,50,4);');
subplot('position',[0.1 0.2 0.75 0.7]);
plot(t,x);
grid on;
title('Sinus ');
xlabel('time [s]');
ylabel('Amplitude [V]');
else
    
end