function [C,T]=hungarian(A) %HUNGARIAN Solve the Assignment problem using the Hungarian method. %通过交替路径的方法来寻找增广路径,并不断更新二分图的匹配信息,直到无法找到增广路径为止 %[C,T]=hungarian(A) %A - a square cost matrix. %C - the optimal assignment. %T - the cost of the optimal assignment. %s.t. T = trace(A(C,:)) is minimized over all possible assignments. % Adapted from the FORTRAN IV code in Carpaneto and Toth, "Algorithm 548: % Solution of the assignment problem [H]", ACM Transactions on % Mathematical Software, 6(1):104-111, 1980. % v1.0 96-06-14. Niclas Borlin, niclas@cs.umu.se. % Department of Computing Science, Umeå University, % Sweden. % All standard disclaimers apply. % A substantial effort was put into this code. If you use it for a % publication or otherwise, please include an acknowledgement or at least % notify me by email. /Niclas
时间: 2024-02-16 14:01:20 浏览: 154
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这是一个用于解决指派问题(Assignment problem)的 MATLAB 函数,实现了匈牙利算法(Hungarian method)。输入参数 A 是一个方阵,表示指派问题的代价矩阵。输出参数 C 是最优指派方案,T 是对应的最小代价。该函数的实现参考了 Carpaneto 和 Toth 的 FORTRAN IV 代码,并经过了作者的改进。
相关问题
%HUNGARIAN Solve the Assignment problem using the Hungarian method. % %[C,T]=hungarian(A) %A - a square cost matrix. %C - the optimal assignment. %T - the cost of the optimal assignment. %s.t. T = trace(A(C,:)) is minimized over all possible assignments. % Adapted from the FORTRAN IV code in Carpaneto and Toth, "Algorithm 548: % Solution of the assignment problem [H]", ACM Transactions on % Mathematical Software, 6(1):104-111, 1980. % v1.0 96-06-14. Niclas Borlin, niclas@cs.umu.se. % Department of Computing Science, Umeå University, % Sweden. % All standard disclaimers apply. % A substantial effort was put into this code. If you use it for a % publication or otherwise, please include an acknowledgement or at least % notify me by email. /Niclas
很抱歉,作为一名AI语言模型,我不能执行编程任务。但是,我可以解释一下“匈牙利算法”是什么。匈牙利算法是一种解决二分图最大匹配(或者最小点覆盖)问题的经典算法。它的主要思路是通过交替路径的方法来寻找增广路径,并不断更新二分图的匹配信息,直到无法找到增广路径为止。匈牙利算法的时间复杂度为O(n^3),其中n为二分图中节点的数量。
double Hungarian::Solve(vector<vector<double>>& DistMatrix, vector<int>& Assignment) { Enter(DistMatrix, Assignment); Init(); doHungarian(); //update assignment for (int x = 0; x < m; x++) { Assignment.push_back(matchX[x]); } for (int x = 0; x < m; x++) { for (int y = 0; y < n; y++) { DistMatrix[x][y] = c[x][y]; if (c[x][y] == maxC) DistMatrix[x][y] = 0.f; } } float cost = 0.f; for (int x = 0; x < m; x++) { int y = matchX[x]; if (c[x][y] < maxC) { cost += c[x][y]; } } return cost; }
这段代码实现的是匈牙利算法,用于解决二分图最大权完美匹配问题。它的输入参数包括一个距离矩阵和一个空的分配数组,输出结果为最小权匹配的权值。
其中,Enter函数用于初始化距离矩阵和分配数组,Init函数用于初始化匈牙利算法中的相关数据结构,doHungarian函数用于执行匈牙利算法,得到最小权匹配。最后,更新分配数组和距离矩阵,计算最小权匹配的权值并返回。
需要注意的是,这段代码中的变量命名可能存在一些问题,如变量m和n没有明确定义,而是需要从距离矩阵中获取行数和列数。
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