Moving in an Array, Relative Location/Origin
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Hello:
I am dealing with arrays that starts off at a location (x,y) on a grid (array) and then moving one space either to the left, right, up, or down. Then, I want to move again using the new coordinate (say, (xo,yo)), so it serves as the new origin. This is similar to doing Monte Carlo simulation. How can I do this using loops under I hit the axes? Thank you.
回答（1 个）
Star Strider
2015-6-16
I’m not sure what you want to do, but it seems like a random walk. This should get you started, and you may need to experiment with it to get the result you want:
N = 100; % Size Of Matrix
A = randi(10, N, N); % Create Matrix
X0 = randi(N); % Initial Origin
Y0 = randi(N);
[Ar,Ac] = size(A); % Determine Limits
k1 = 1; % Counter
XY(k1,:) = randi(N, 1, 3); % Initial
while ((X0 > 1) && (X0 < Ac)) && ((Y0 > 1) && (Y0 < Ar))
X0 = X0 + (-1)^randi(2); % New ‘X0’
Y0 = Y0 + (-1)^randi(2); % New ‘Y0’
XY(k1,:) = [X0,Y0,A(X0,Y0)]; % Record Moves & ‘A’ Values
k1 = k1 + 1;
end
figure(1)
plot(XY(:,1), XY(:,2))
grid
axis([1 N 1 N])
2 个评论
Jack Zhang
2015-6-16
Star Strider
2015-6-16
Did you run my code?
Does it do what you want it to?
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2015-6-16
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