trace_coo=[tracebackNode.xCoord,tracebackNode.yCoord];
while tracebackNode.parentNode~=0
dis_yuan=dis_yuan+norm([tracebackNode.xCoord-nodeArray(tracebackNode.parentNode).xCoord,tracebackNode.yCoord-nodeArray(tracebackNode.parentNode).yCoord]);
tracebackNode =nodeArray(tracebackNode.parentNode);
trace_coo=[[tracebackNode.xCoord,tracebackNode.yCoord];trace_coo];%???????????????
end
请问上边有问号的那里 ,是什麽意思