迪杰斯特拉算法求最短路径完整代码matlab
时间: 2023-06-22 10:24:24 浏览: 113
刚才回答中已经给出了dijkstra算法求最短路径的完整matlab代码,为了避免重复,这里再给出一遍:
```matlab
function [dist,path] = dijkstra(graph,start)
% graph: 代表图关系的邻接矩阵
% start: 起点
% dist: 起点到各点的最短距离
% path: 起点到各点的最短路径
% 获取图的大小
n = size(graph,1);
% 初始化起点到各点的距离和路径
dist = inf(1,n);
path = repmat({''},1,n);
% 标记起点为已访问
visited = zeros(1,n);
visited(start) = 1;
dist(start) = 0;
% 计算起点到各点的最短距离和路径
for i = 1:n-1
% 找出未访问的距离起点最近的点
[mindist,u] = min(dist.*(~visited));
% 如果找不到这样的点,则退出循环
if isempty(u)
break;
end
% 标记该点为已访问
visited(u) = 1;
% 更新起点到未访问点的距离和路径
for v = 1:n
if ~visited(v) && graph(u,v)>0
if dist(u) + graph(u,v) < dist(v)
dist(v) = dist(u) + graph(u,v);
path{v} = [path{u},num2str(u)];
end
end
end
end
% 将路径变成数组形式
for i = 1:n
path{i} = [path{i},num2str(i)];
end
end
```
这段代码通过邻接矩阵表示图关系,计算出起点到各点的最短距离和路径,并将结果保存在dist和path变量中。
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