因子图 matlab 代码
时间: 2023-08-06 19:11:47 浏览: 82
以下是一个简单的因子图算法的 MATLAB 代码示例:
```
function [factors] = factor_graph(adj_matrix, num_vars)
% Function to create a factor graph from an adjacency matrix
% Inputs:
% adj_matrix: adjacency matrix of the factor graph
% num_vars: number of variables in the factor graph
% Outputs:
% factors: cell array of factor functions
factors = {};
for i = 1:num_vars
% create variable node for ith variable
var_node = struct();
var_node.type = 'variable';
var_node.id = i;
var_node.factors = [];
for j = 1:size(adj_matrix, 1)
% check if there is a factor node connected to ith variable
if adj_matrix(i,j) == 1 && j > num_vars
% create factor node for connected factor
factor_node = struct();
factor_node.type = 'factor';
factor_node.id = j;
factor_node.variables = [];
% add variables connected to factor node
for k = 1:num_vars
if adj_matrix(k,j) == 1 && k ~= i
factor_node.variables = [factor_node.variables k];
end
end
% add factor node to variable node's factors list
var_node.factors = [var_node.factors factor_node];
end
end
% add variable node to list of factors
factors = [factors var_node];
end
end
```
该代码将一个因子图的邻接矩阵作为输入,并返回一个由变量节点和因子节点组成的因子图。在此代码中,每个变量节点都记录其连接的因子节点,并且每个因子节点都记录其连接的变量节点。您可以根据需要修改此代码以符合您的具体应用程序。