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Óи÷½ÚµãµÄȨֵ¾ØÕó£¬ÒªÕÒ³öͼÖÐÆðµãºÍÖÕµãµÄËùÓз¾¶ ÎÊÌâÒ»£º³ÌÐòµÄÇåÎú¡¢¾ßÌåµÄ˼·ÊÇʲô£¿³õѧMATLAB£¬ºÃÄÑÀíÇåÕâ¸ö³ÌÐòÒ»²½²½ÊÇÔõôËãµÄ ÎÊÌâ¶þ£º¾ØÕ󳬹ý10X10Ö®ºó£¬¾ÍÔËÐв»³öÀ´ ³ÌÐòÈçÏ£º function possiablePaths = findPath(Graph, partialPath, destination, partialWeight) % findPath°´Éî¶ÈÓÅÏÈËÑË÷ËùÓпÉÄܵĴÓpartialPath³ö·¢µ½destinationµÄ·¾¶£¬ÕâЩ·¾¶Öв»°üº¬»·Â· % Graph: Â·ÍøÍ¼£¬·ÇÎÞÇî»ò0±íʾÁ½½ÚµãÖ®¼äÖ±½ÓÁ¬Í¨£¬¾ØÕóÖµ¾ÍÎªÂ·ÍøÈ¨Öµ % partialPath: ³ö·¢µÄ·¾¶£¬Èç¹ûpartialPath¾ÍÒ»¸öÊý£¬±íʾÕâ¸ö¾ÍÊÇÆðʼµã % destination: Ä¿±ê½Úµã % partialWeight: partialPathµÄȨֵ£¬µ±partialPathΪһ¸öÊýʱ£¬partialWeightΪ0 pathLength = length(partialPath); lastNode = partialPath(pathLength); %µÃµ½×îºóÒ»¸ö½Úµã nextNodes = find(0<Graph(lastNode, & Graph(lastNode, <inf); %¸ù¾ÝGraphͼµÃµ½×îºóÒ»¸ö½ÚµãµÄÏÂÒ»¸ö½ÚµãGLength = length(Graph); possiablePaths = []; if lastNode == destination % Èç¹ûlastNodeÓëÄ¿±ê½ÚµãÏàµÈ£¬Ôò˵Ã÷partialPath¾ÍÊÇ´ÓÆä³ö·¢µ½Ä¿±ê½ÚµãµÄ·¾¶£¬½á¹ûÖ»ÓÐÕâÒ»¸ö£¬Ö±½Ó·µ»Ø possiablePaths = partialPath; possiablePaths(GLength + 1) = partialWeight; return; elseif length( find( partialPath == destination ) ) ~= 0 return; end %nextNodesÖеÄÊýÒ»¶¨´óÓÚ0,ËùÒÔΪÁËÈÃnextNodes(i)È¥µô£¬ÏȽ«Æä¸³ÖµÎª0 for i=1:length(nextNodes) if destination == nextNodes(i) %Êä³ö·¾¶ tmpPath = cat(2, partialPath, destination); %´®½Ó³ÉÒ»ÌõÍêÕûµÄ·¾¶ tmpPath(GLength + 1) = partialWeight + Graph(lastNode, destination); %ÑÓ³¤Êý×鳤¶ÈÖÁGLength+1, ×îºóÒ»¸öÔªËØÓÃÓÚ´æ·Å¸Ã·¾¶µÄ×Ü·×è possiablePaths( length(possiablePaths) + 1 , : ) = tmpPath; nextNodes(i) = 0; elseif length( find( partialPath == nextNodes(i) ) ) ~= 0 nextNodes(i) = 0; end end nextNodes = nextNodes(nextNodes ~= 0); %½«nextNodesÖÐΪ0µÄֵȥµô£¬ÒòΪÏÂÒ»¸ö½Úµã¿ÉÄÜÒѾ±éÀú¹ý»òÕßËü¾ÍÊÇÄ¿±ê½Úµã for i=1:length(nextNodes) tmpPath = cat(2, partialPath, nextNodes(i)); tmpPsbPaths = findPath(Graph, tmpPath, destination, partialWeight + Graph(lastNode, nextNodes(i))); possiablePaths = cat(1, possiablePaths, tmpPsbPaths); end %ÊäÈëÍ©Ïçµ½¸»ÑôµÄ¸ßËÙ¹«Â·ÍøÂçͼµÄ±ßȨ¾ØÕó a=[0,62,66,inf,inf,inf,inf; 62,0,inf,25,11,inf,inf; 66,inf,0,9,inf,inf,49; inf,25,9,0,11,14,inf; inf,11,inf,11,0,13,inf; inf,inf,inf,14,13,0,35.8; inf,inf,49,inf,inf,35.8,0;]; %µ÷ÓÃËÑË÷ͼÖÐÈÎÒâÁ½µã¼äËùÓз¾¶µÄMÎļþ findPath(a, 1, 7, 0) ³ÌÐòÀ´Ô´http://www.ilovematlab.cn/thread-212175-1-1.html »òÕßhttp://www.360doc.com/content/11/0818/21/2617151_141536552.shtml |
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