导入坐标点,使用Prim算法求解最小生成树MT 用matlab将MT分解为n'棵子树
时间: 2024-06-11 10:08:01 浏览: 140
由于没有给出具体的坐标点,以下代码中的坐标点均为随机生成。
首先,我们需要导入坐标点,这里我们随机生成10个坐标点。
```matlab
% 随机生成10个坐标点
n = 10;
points = rand(n, 2);
```
接下来,我们使用Prim算法求解最小生成树MT。
```matlab
% 构造邻接矩阵
W = zeros(n);
for i = 1:n
for j = i+1:n
W(i, j) = norm(points(i,:) - points(j,:));
W(j, i) = W(i, j);
end
end
% Prim算法求解最小生成树MT
MT = zeros(n);
visited = false(n, 1);
visited(1) = true;
for k = 1:n-1
minW = Inf;
minI = -1;
minJ = -1;
for i = 1:n
if visited(i)
for j = 1:n
if ~visited(j) && W(i, j) < minW
minW = W(i, j);
minI = i;
minJ = j;
end
end
end
end
MT(minI, minJ) = minW;
MT(minJ, minI) = minW;
visited(minJ) = true;
end
```
最后,我们将MT分解为n'棵子树。
```matlab
% 将MT分解为n'棵子树
visited = false(n, 1);
visited(1) = true;
child = zeros(n, 1);
for i = 2:n
minW = Inf;
minJ = -1;
for j = 1:n
if visited(j)
for k = 1:n
if ~visited(k) && MT(j, k) < minW
minW = MT(j, k);
minJ = k;
end
end
end
end
child(minJ) = find(MT(minJ,:) == minW);
visited(minJ) = true;
end
% 输出每棵子树的根节点和子节点
for i = 1:n
if child(i) == 0
fprintf('根节点:%d,子节点:', i);
for j = 1:n
if child(j) == i
fprintf('%d ', j);
end
end
fprintf('\n');
end
end
```
完整代码如下:
```matlab
% 随机生成10个坐标点
n = 10;
points = rand(n, 2);
% 构造邻接矩阵
W = zeros(n);
for i = 1:n
for j = i+1:n
W(i, j) = norm(points(i,:) - points(j,:));
W(j, i) = W(i, j);
end
end
% Prim算法求解最小生成树MT
MT = zeros(n);
visited = false(n, 1);
visited(1) = true;
for k = 1:n-1
minW = Inf;
minI = -1;
minJ = -1;
for i = 1:n
if visited(i)
for j = 1:n
if ~visited(j) && W(i, j) < minW
minW = W(i, j);
minI = i;
minJ = j;
end
end
end
end
MT(minI, minJ) = minW;
MT(minJ, minI) = minW;
visited(minJ) = true;
end
% 将MT分解为n'棵子树
visited = false(n, 1);
visited(1) = true;
child = zeros(n, 1);
for i = 2:n
minW = Inf;
minJ = -1;
for j = 1:n
if visited(j)
for k = 1:n
if ~visited(k) && MT(j, k) < minW
minW = MT(j, k);
minJ = k;
end
end
end
end
child(minJ) = find(MT(minJ,:) == minW);
visited(minJ) = true;
end
% 输出每棵子树的根节点和子节点
for i = 1:n
if child(i) == 0
fprintf('根节点:%d,子节点:', i);
for j = 1:n
if child(j) == i
fprintf('%d ', j);
end
end
fprintf('\n');
end
end
```
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