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[ÇóÖú] MATLABÉúÃüµÄÓÎÏ·´úÂëÇóÖú

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%set a few cells to one
cells(n/2,.25*n:.75*n) = 1;
cells(.25*n:.75*n,n/2) = 1;

cells = (rand(n,n))<.5 ;
%how long for each case to stability or simple oscillators
¸ù¾ÝÉÏÃæµÄ´úÂë¿ÉÒÔÖªµÀ£¬cells(n/2,.25*n:.75*n) = 1;cells(.25*n:.75*n,n/2) = 1ÊǸøcells¾ØÕó¸³Öµ£¬µ«ÊÇÎÒ¾õµÃcells = (rand(n,n))<.5 ¾ÍÒѾ­¿ÉÒÔÍê³ÉÈÎÎñÁË£¬¶øÇÒ¼ÓÉÏcells = (rand(n,n))<.5 ÕâÒ»¾äºó£¬cells(n/2,.25*n:.75*n) = 1;cells(.25*n:.75*n,n/2) = 1µÄЧ¹ûÒ²ÌåÏÖ²»³öÀ´°¡£¿ÁíÍ⣬cells = (rand(n,n))<.5 ÎÒ¾õµÃ¾ÍÖ»Óи³Öµ¹¦ÄÜ£¬µ«ÊÇ¿´×¢ÊͺÃÏñ»¹ÓÐ×÷ΪÆÀÅбê×¼µÄÒâ˼£¨%how long for each case to stability or simple oscillators£©£¿
µÚ¶þ£¬%nearest neighbor sum
        sum(x,y) = cells(x,y-1) + cells(x,y+1) +cells(x-1, y) + cells(x+1,y) + cells(x-1,y-1) + cells(x-1,y+1) +cells(3:n,y-1) + cells(x+1,y+1);
Õâ¸öÊǼÆËãÒ»¸ö·½¸ñÖÜΧ½üÁڵĸöÊý£¬ cells(3:n,y-1)ÊÇʲôÒâ˼£¬¿´µ½ºÜ¶à¼ÆËã½üÁڵĴúÂë¶¼ÊÇÕâÑùдµÄ£¬ÎÒ¾õµÃÓ¦¸ÃÊÇ cells(x+1,y-1)°¡¡£
µÚÈý£¬ % The CA rule      
cells = (sum==3) | (sum==2 & cells)¡£ Õâ¾ä¾Í²»Ã÷°×ÁË£¬ÎÒ¾õµÃÓ¦¸ÃÊÇcells£¨x£¬y£© = (sum£¨x£¬y£©==3) | (sum£¨x£¬y£©==2 & cells)¡£¡££¿

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%Conway's life with GUI
clf
clear all
%=============================================
%build the GUI
%define the plot button
plotbutton=uicontrol('style','pushbutton',...
   'string','Run', ...
   'fontsize',12, ...
   'position',[100,400,50,20], ...
   'callback', 'run=1;');
%define the stop button
erasebutton=uicontrol('style','pushbutton',...
   'string','Stop', ...
   'fontsize',12, ...
   'position',[200,400,50,20], ...
   'callback','freeze=1;');
%define the Quit button
quitbutton=uicontrol('style','pushbutton',...
   'string','Quit', ...
   'fontsize',12, ...
   'position',[300,400,50,20], ...
   'callback','stop=1;close;');
number = uicontrol('style','text', ...
    'string','1', ...
   'fontsize',12, ...
   'position',[20,400,50,20]);   

%=============================================
%CA setup
n=128;
%initialize the arrays
z = zeros(n,n);
cells = z;
sum = z;
%set a few cells to one
cells(n/2,.25*n:.75*n) = 1;
cells(.25*n:.75*n,n/2) = 1;
%cells(.5*n-1,.5*n-1)=1;
%cells(.5*n-2,.5*n-2)=1;
%cells(.5*n-3,.5*n-3)=1;
cells = (rand(n,n))<.5 ;
%how long for each case to stability or simple oscillators
%build an image and display it
imh = image(cat(3,cells,z,z));
set(imh, 'erasemode', 'none')
axis equal
axis tight
%index definition for cell update
x = 2:n-1;
y = 2:n-1;
%Main event loop
stop= 0; %wait for a quit button push
run = 0; %wait for a draw
freeze = 0; %wait for a freeze
while (stop==0)     
    if (run==1)
        %nearest neighbor sum
        sum(x,y) = cells(x,y-1) + cells(x,y+1) + ...
            cells(x-1, y) + cells(x+1,y) + ...
            cells(x-1,y-1) + cells(x-1,y+1) + ...
            cells(3:n,y-1) + cells(x+1,y+1);
        % The CA rule
        cells = (sum==3) | (sum==2 & cells);      
        %draw the new image
        set(imh, 'cdata', cat(3,cells,z,z) )
        %update the step number diaplay
        stepnumber = 1 + str2num(get(number,'string'));
        set(number,'string',num2str(stepnumber))
    end   
    if (freeze==1)
        run = 0;
        freeze = 0;
    end
        drawnow  %need this in the loop for controls to work
   
end
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