How to define a variable which is numerical and changes in every cycle of the while loop?

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Zarak kh 2019-9-26

0
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https://ww2.mathworks.cn/matlabcentral/answers/482314-how-to-define-a-variable-which-is-numerical-and-changes-in-every-cycle-of-the-while-loop

关闭： MATLAB Answer Bot 2021-8-20

Hello.

I have a code that in a part of it there is a while loop, which is shown as below:

 while all(DIST((1:ncities),(1:ncities))<realmax)
        [mindist,nextcity]= min(newDIST(currentcity,:))
        while [xi yi]>0 & [xi yi]== all(nextcity*(1:2))==0
            [xi,yi,ii]=polyxpoly(outxd,outyd,all([currentcity;nextcity],1),all([currentcity;nextcity],2));
            [row, col]=find(all(:,1)==transpose(z(ii(:,1),1)));
            vec=[row,row+1];
            [mindistedge,nextcity]=min(newDIST(vec,currentcity));
            nextcity=vec(nextcity);
        end
        traveleddist=traveleddist+DIST(currentcity,nextcity)
 end
 

I defined all the matrix in the first part when I run the code I got an error "xi" in not defined,so here is my question how can I define xi and yi which changes in each cycle of the loop and I need the loop to run untile there is no intersection between lines.

Thanks for your help in advance.