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
