How to randomize points using a GUI

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I have created a GUI that has a push button that you can add points to the graph and a button to randomize the added point. I had to plot a singular point and then later created a function that adds points. when I click the randomize button it only randomizes the first point I created but I need it to randomize for all of the points that get added. I'm not sure how to do so but here is what I have created so far:
f= figure;
ax= axes('Parent',f,'Position',[0.05, 0.25, 0.9, 0.7]);
xlim = ([0,1]);
ylim = ([0,1]);
x = 0.25;
y = 0.55;
point_plot_handle = plot(x,y,'d','MarkerFaceColor','m','MarkerSize',75);
hold on;
my_button = uicontrol('style','pushbutton');
set(my_button, 'units', 'normalized', 'position', [0.05,0.05,0.3,0.15])
set(my_button, 'string','Add Point')
set(my_button, 'callback', @add_point)
my_second_button = uicontrol('style','pushbutton');
set(my_second_button, 'units', 'normalized', 'position', [0.35,0.05,0.3,0.15])
set(my_second_button, 'string', 'Clear')
set(my_second_button, 'callback', @clear)
my_third_button = uicontrol('style', 'pushbutton');
set(my_third_button, 'units', 'normalized','position', [0.65,0.05,0.3,0.15])
set(my_third_button, 'string', 'Randomize')
set(my_third_button, 'callback', {@randomize,point_plot_handle});
function randomize(sender, eventdata, h)
new_point = randn(2,1);
set(h,'XData', new_point(1), 'YData', new_point(2));
end
function clear(sender, eventdata)
empty = cla;
end
function add_point(~,~)
l='od+.';
plot(rand,rand,l(randi(4)),'MarkerFaceColor',rand(1,3),'MarkerSize',35);
end

Accepted Answer

David Hill
David Hill on 30 Nov 2022
Edited: David Hill on 30 Nov 2022
Please accept my previous answer if it was acceptable to you.
GUI
function GUI()
f= figure;
axes('Parent',f,'Position',[0.05, 0.25, 0.9, 0.7]);
x = 0.25;
y = 0.55;
h = plot(x,y,'d','MarkerFaceColor','m','MarkerSize',35);
ax=gca;
ax.XLim = [0,1];
ax.YLim = [0,1];
hold on;
my_button = uicontrol('style','pushbutton');
set(my_button, 'units', 'normalized', 'position', [0.05,0.05,0.3,0.15])
set(my_button, 'string','Add Point')
set(my_button, 'callback',@add_point)
my_second_button = uicontrol('style','pushbutton');
set(my_second_button, 'units', 'normalized', 'position', [0.35,0.05,0.3,0.15])
set(my_second_button, 'string', 'Clear')
set(my_second_button, 'callback', @clear)
my_third_button = uicontrol('style', 'pushbutton');
set(my_third_button, 'units', 'normalized','position', [0.65,0.05,0.3,0.15])
set(my_third_button, 'string', 'Randomize')
set(my_third_button, 'callback', @randomize);
function randomize(~,~)
for k=1:length(h)
h(k).XData=rand;
h(k).YData=rand;
end
end
function clear(~,~)
cla;
h=[];
end
function add_point(~,~)
l='od+.';
h=[h,plot(rand,rand,l(randi(4)),'MarkerFaceColor',rand(1,3),'MarkerSize',35)];
end
end
  3 Comments
David Hill
David Hill on 1 Dec 2022
The above works. I am storing all the lines in variable h. Just run the function GUI.

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