added conways, handouts

conways/clip.m

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+function R = clip(X, x_min, x_max)
+	R = (X >= x_max) & ~(X <= x_min);
+end

conways/conway.m

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+%%%% Conway's Game of Life. For MATLAB Seminar. James Ryan 2024
+
+function conway(image_path)
+	if (~exist('image_path', 'var'))
+		close all; clear; clc;
+		imageIn = randi([0 1], 480, 640);
+   	else % image path specified (eg: `conway("zaza.jpeg")`)
+		imageIn = importdata(image_path);
+		imageIn = 0.2989*imageIn(:,:,1) ...
+		      + 0.5870*imageIn(:,:,2) ...
+		      + 0.1140*imageIn(:,:,3);
+		
+		imageMean = cast(mean(imageIn),"uint8");
+		imageIn = ~(clip(imageIn, imageMean - 1, ... 
+		                          imageMean));
+	end
+
+	[imageLong imageLat] = size(imageIn);
+
+	board = imshow(imageIn, InitialMagnification=imageLong);
+	pause(0.25);
+	% Run conways!
+	while true
+		pause(0.5);
+		board.CData = update(board.CData);
+		drawnow;
+	end
+end

conways/feedback/clip.m

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+function R = clip(X, x_min, x_max)
+	R = (X >= x_max) & ~(X <= x_min);
+end

conways/feedback/conway.m

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+%%%% Conway's Game of Life. For MATLAB Seminar. James Ryan 2024
+		% <+.5>
+
+function conway(image_path)
+	if (~exist('image_path', 'var'))
+		close all; clear; clc;
+		imageIn = randi([0 1], 480, 640);
+   	else % image path specified (eg: `conway("zaza.jpeg")`)
+		imageIn = importdata(image_path);
+		imageIn = 0.2989*imageIn(:,:,1) ...
+		      + 0.5870*imageIn(:,:,2) ...
+		      + 0.1140*imageIn(:,:,3);
+		
+		imageMean = cast(mean(imageIn),"uint8");
+		imageIn = ~(clip(imageIn, imageMean - 1, ... 
+		                          imageMean));
+		% <+.2> holy shit thank you
+	end
+
+	[imageLong imageLat] = size(imageIn);
+
+	board = imshow(imageIn, InitialMagnification=imageLong);
+	pause(0.25);
+	% Run conways!
+	while true
+		pause(0.5);
+		board.CData = update(board.CData);
+		drawnow;
+	end
+end

conways/feedback/growth.m

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+% growth function: given some matrix, determines whether a cell's neighbor
+%   should die or live.
+% for any given entry u in matrix U:
+%	u == 3 --> u_iter = 1
+%	u > 3 OR u < 2 --> u_iter = -1
+%	else u = 0
+function U_iter = growth(U)
+	K = [1 1 1; 1 0 1; 1 1 1];
+
+	U_iter = conv2(U, K, 'same');
+	U_iter = (U_iter == 3) - (U_iter > 3 | U_iter < 2);
+end

conways/feedback/update.m

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+function G_iter = update(G)
+	G_iter = clip(G + growth(G), 0, 1);
+end

conways/feedback/zaza.jpeg

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+../zaza.jpeg

conways/growth.m

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+% growth function: given some matrix, determines whether a cell's neighbor
+%   should die or live.
+% for any given entry u in matrix U:
+%	u == 3 --> u_iter = 1
+%	u > 3 OR u < 2 --> u_iter = -1
+%	else u = 0
+function U_iter = growth(U)
+	K = [1 1 1; 1 0 1; 1 1 1];
+
+	U_iter = conv2(U, K, 'same');
+	U_iter = (U_iter == 3) - (U_iter > 3 | U_iter < 2);
+end

conways/update.m

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+function G_iter = update(G)
+	G_iter = clip(G + growth(G), 0, 1);
+end