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 07-13-2012, 05:32 AM PM User | #1 juslai New Coder   Join Date: Jul 2012 Location: Philippines Posts: 35 Thanks: 5 Thanked 0 Times in 0 Posts Anyone know matlab? i am studying this code to modify it to read a text file for input but i cant seem to make it work first it says "Not enough input arguments." Code: ```function [d dt pred] = bfs(A,u,target) % BFS Compute breadth first search distances, times, and tree for a graph % % [d dt pred] = bfs(A,u) returns the distance (d) and the discover time % (dt) for each vertex in the graph in a breadth first search % starting from vertex u. % d = dt(i) = -1 if vertex i is not reachable from u % pred is the predecessor array. pred(i) = 0 if vertex (i) % is in a component not reachable from u and i != u. % % [...] = bfs(A,u,v) stops the bfs when it hits the vertex v % % Example: % load_gaimc_graph('bfs_example.mat') % use the dfs example from Boost % d = bfs(A,1) % % See also DFS % David F. Gleich % Copyright, Stanford University, 2008-20098 % History % 2008-04-13: Initial coding if ~exist('target','var') || isempty(full), target=0; end if isstruct(A), rp=A.rp; ci=A.ci; else [rp ci]=sparse_to_csr(A); end n=length(rp)-1; d=-1*ones(n,1); dt=-1*ones(n,1); pred=zeros(1,n); sq=zeros(n,1); sqt=0; sqh=0; % search queue and search queue tail/head % start bfs at u sqt=sqt+1; sq(sqt)=u; t=0; d(u)=0; dt(u)=t; t=t+1; pred(u)=u; while sqt-sqh>0 sqh=sqh+1; v=sq(sqh); % pop v off the head of the queue for ri=rp(v):rp(v+1)-1 w=ci(ri); if d(w)<0 sqt=sqt+1; sq(sqt)=w; d(w)=d(v)+1; dt(w)=t; t=t+1; pred(w)=v; if w==target, return; end end end end```

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