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Why does it only detect diagonal connect 4s (Ns) in this direction ↖, but not in this direction ↗ ?

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The Legend
The Legend 2019-12-16
关闭： Stephen23 2019-12-16
Why does it only detect diagonal connect 4s (Ns) in this direction ↖, but not in this direction ↗ ?
My function
function victory = checkVictory(M, N);
victory = 0;
checkColor = 1;
rowCheck = any(~cellfun(@isempty,regexp(cellstr(char(M)),char(checkColor*ones(1,N)))));
colCheck = any(~cellfun(@isempty,regexp(cellstr(char(M).'),char(checkColor*ones(1,N)))));
diaList = spdiags(M);
diaCheck = any(~cellfun(@isempty,regexp(cellstr(char(diaList).'),char(checkColor*ones(1,N)))));
connectionFound = any([rowCheck,colCheck,diaCheck]);
if connectionFound == true;
victory = 1;
else
checkColor = 2;
rowCheck = any(~cellfun(@isempty,regexp(cellstr(char(M)),char(checkColor*ones(1,N)))));
colCheck = any(~cellfun(@isempty,regexp(cellstr(char(M).'),char(checkColor*ones(1,N)))));
diaList = spdiags(M);
diaCheck = any(~cellfun(@isempty,regexp(cellstr(char(diaList).'),char(checkColor*ones(1,N)))));
connectionFound = any([rowCheck,colCheck,diaCheck]);
if connectionFound == true;
victory = 2;
end
end
end
Output
Input piece in column [player 1]: 3
---------------
| | | | | | | | % x = player 1
| | | | | | |x| % o = player 2
| | | | | |x|o|
| | |x|o|x|x|x| % <--- Here you can see that it doesn't the detect the diagonal connect 4 of 'x'
| |x|o|x|o|o|o|
|o|x|x|x|o|o|o|
---------------
Input piece in column [player 2]: 3
---------------
| | | | | | | |
| | | | | | |x|
| | |o| | |x|o| % <--- Here you can see that it DOES the detect the diagonal connect 4 of 'o'
| | |x|o|x|x|x|
| |x|o|x|o|o|o|
|o|x|x|x|o|o|o|
---------------
Player 2 has won the game!Play again? [yes/no]

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The Legend
The Legend 2019-12-16
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