Help. Why does my matlab code work one moment, and then suddenly stops working?

8 次查看（过去 30 天）
Xi Wen Lim
Xi Wen Lim 2016-3-26
评论： Image Analyst 2016-3-30
It just suddenly keeps runnning forever. Please help.
%%Initial Populations
%%------------------------------------------------
%Path Selection
clear start_node end_node Dist Fit
fprintf('Enter Integer Only');
start_node=input('Start Node: ');
end_node=input('End Node: ');
dist = zeros(49,49);
%import distance values from excel
for i = 1:168
dist(Node1(i,1), Node2(i,1)) = Distance(i,1);
end
clear path;
n=2;
path(1,1)=start_node;
start=start_node;
dist1=dist;
total_dist=0;
%o=0;
%r=0 might not need
while start ~= end_node
clear store_value chosen;
k=1;
%possible next node number
for j=1:49
if dist1(start,j) > 0
store_value(k)=j;
k=k+1;
end
end
%random choosing for next node number
idx = randperm(numel(store_value));
chosen = store_value(idx(1));
%Should never have this situaiton since 2D analysis only
%if chosen - start == 25 & r==0;
% r=1;
%elseif chosen - start == 25 && r==1
% while chosen - start == 25
% idx=randperm(numel(store_value));
% chosen = store_value(idx(1));
% end
%r=0;
% end
%Path
path(1,n) = chosen;
n=n+1;
start = chosen;
end
%End of Path Selection
%%Path Elimination
%---------------------------------------------------
a = numel(unique(path));
b = numel(path);
path1 = path;
while numel(path) ~= numel(unique(path))
h=0;
x=numel(path);
for h=1:x
if h<x-2 && path(1,h) == path(1,h+2)
path([h+1,h+2]) = [];
x=numel(path);
elseif h == x-1 || h == x
break;
end;
x=numel(path);
end
k = 1;
for j = 1:x
if j < x-2 && path(1,j) == path(1,j+2)
k = k+1;
end
end
if k == 1;
break;
end
end
path3 = path;
while true
pathhist = histcounts(path3, [unique(path3), Inf]);
duplicate = path3(find(pathhist > 1, 1)); %find identical digit
if isempty(duplicate)
break; %nothing left to remove, exit loop
end
occurences = path3 == duplicate;
path3(find(occurences, 1) : find(occurences, 1, 'last')-1) = []; %delete 1st occurence and anything up to last occurence
end

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回答（1 个）

Image Analyst
Image Analyst 2016-3-26
I guess you entered something that caused an infinite loop. What inputs did you provide it?
And read this to fix your formatting.
  2 个评论
Xi Wen Lim
Xi Wen Lim 2016-3-26
Sorry I don't really understand what you mean. The entire code script is above. Um. I entered 1 for start_node and 49 for end_node. And imported some values from excel over into matlab.
Image Analyst
Image Analyst 2016-3-30
It says it doesn't know what Distance is. If you still need help, post the code and workbook to get the Distance values into your program so I can run it.

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