一点到多点总路径最短问题matlab代码
时间: 2023-10-03 14:02:21 浏览: 74
下面是一点到多点总路径最短问题的Matlab代码示例,使用了Dijkstra算法:
```matlab
function [dist, path] = dijkstra_multi(G, s, T)
% G: 邻接矩阵表示的图
% s: 起点
% T: 终点集合
% dist: 起点到各个终点的最短距离
% path: 路径集合
n = size(G, 1);
dist = inf(1, length(T));
path = cell(1, length(T));
visited = false(1, n);
prev = zeros(1, n);
% 初始化
for i = 1:length(T)
dist(i) = G(s, T(i));
if dist(i) < inf
path{i} = [s, T(i)];
end
end
visited(s) = true;
% Dijkstra算法
while sum(~visited(T)) > 0
[min_dist, u] = min(dist);
if min_dist == inf
break;
end
visited(u) = true;
for v = 1:n
if G(u, v) < inf && ~visited(v)
new_dist = min_dist + G(u, v);
if new_dist < dist(find(T == v))
dist(find(T == v)) = new_dist;
path{find(T == v)} = [path{find(T == u)}, v];
prev(v) = u;
end
end
end
end
% 输出结果
for i = 1:length(T)
if dist(i) == inf
path{i} = [];
end
end
```
其中,邻接矩阵G的第i行第j列表示从节点i到节点j的边的权值,如果没有边则为inf。输入参数s为起点,T为终点集合,输出结果dist为起点到各个终点的最短距离,path为路径集合,即起点到各个终点的最短路径。
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