我试图在Matlab中编写Conway的生活游戏，但有些事情一直存在问题。我没有收到错误，所以我不知道自己做错了什么，它什么也做不了。我认为这个问题可能与细胞的计数有关（检查邻居的数量）或增加矩阵边界处细胞的规则。
这是我的代码：
TIME = 10;
pulsar; % creates begin matrix X
life{1} = X;
life = {}; % create list 'life'
numrows = size(X,1); % calculate number of rows
numcolumns = size(X,2); % calculate number of columns
current = X; % make seed the first current(matrix you are starting off with in each step)
for i = 0:TIME; % determine amount of times the loop will run
nextnext = X; % create "nextnext" matrix to implement the rules of the game on (copy of X)
for row = 2:numrows-1; % for each row
for column = 2:numcolumns-1; % for each column
east_of_row = column + 1; % define how to count the cell right of target cell
west_of_row = column - 1; % define how to count the cell left of target cell
north_of_column = row - 1; % define how to count the cell north of target cell
south_of_column = row + 1; % define how to count the cell south of target cell
% count neighboring cells:
neighbors = 0; % start counter 'neighbors' with 0
while east_of_row <= size(X),
west_of_row <= size(X);,
north_of_column <= size(X);,
south_of_column <= size(X);
if current(row,east_of_row) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
if current(row,west_of_row) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
if current(north_of_column,column) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
if current(south_of_column,column) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
if current(south_of_column,east_of_row) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
if current(north_of_column,east_of_row) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
if current(north_of_column,west_of_row) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
if current(south_of_column,west_of_row) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
end
while east_of_row == 0,west_of_row == 0;,north_of_column == 0;,south_of_column == 0;
if current row,east_of_row ~= 0;
if current(row,east_of_row) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
end
if current row,west_of_row ~= 0;
if current(row,west_of_row) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
end
if current north_of_column,column ~= 0;
if current(north_of_column,column) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
end
if current south_of_column,column ~= 0;
if current(south_of_column,column) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
end
if current south_of_column,east_of_row ~= 0;
if current(south_of_column,east_of_row) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
end
if current north_of_column,east_of_row ~= 0;
if current(north_of_column,east_of_row) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
end
if current north_of_column,west_of_row ~= 0;
if current(north_of_column,west_of_row) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
end
if current south_of_column,west_of_row ~= 0;
if current(south_of_column,west_of_row) == 1 % if neighboring cell has a value of 1
neighbors + 1; % add 1 to neighbors
end
end
end
neigbors
% rules of the game:
if current(row,column) == 1 % in case a target cell has a value of 1:
if neighbors < 2 % if the number of neighbors is smaller than 2
nextnext(row,column) = 0; % value of target cell gets 0 in nextnext
end
if neighbors == 2 , neighbors == 3 % if the number of neighbors is 2 or 3
nextnext(row,column) = 1; % value of target cell stays 1 in nextnext
end
if neighbors > 3 % if the number of neigbors is higher than 3
nextnext(row,column) = 0; % value of target cell gets 0 in nextnext
end
end
if current (row,column) == 0 % in case a target cell has a value of 0:
if neighbors == 3 % if the number of neighbors is 3
nextnext(row,column) = 1; % value of target cell gets 1 in nextnext
end
if neighbors ~= 3 % if the number of neigbors isn't 3
nextnext(row,column) = 0; % value of target cell stays 0 in nextnext
end
end
end
end
current = nextnext; % make nextnext matrix the current matrix for the next step
life{TIME+1} = nextnext; % add matrix to list 'life
end
show(life);
答案 0 :(得分：1)
哇。你的代码在很多方面都很糟糕......你是否听说过matlab中的矢量化？
要计算每个单元格的邻居数量，您可以通过以下方式完成：
neighbors = conv2( current, [1 1 1;1 0 1; 1 1 1], 'same' );
一旦你有了邻居的数量，你就可以简单地创建下一个时间步骤
nextnext = current.*( neighbors == 2 | neighbors == 3 ) + ... % all cells for which current == 1
( 1 - current ).*( neighbors == 3 );
您拥有的代码存在一些问题：
行neighbors + 1; % add 1 to neighbors实际上不向邻居添加一行。 Matlab没有等效的neighbors++。所以，如果你真的想要增加neighbors，你必须明确地做到：neighbors = neighbors + 1;
我不知道为什么你使用while循环，但语句while east_of_row == 0,west_of_row == 0;,north_of_column == 0;,south_of_column == 0;只检查第一个条件east_of_row == 0，其余的被评估为表达式而不算作循环条件。
下次，如果您没有达到预期效果而且没有看到任何错误，请逐步尝试debugging您的代码。
>> life