八度旅行旅人的情节线

Question

好的，我有以下代码，我希望线从城镇列表中的一个点移到另一点。但是plot命令不能正常工作，有什么想法吗？

  clear;
  clc;

  numberOfTowns = input ("How many towns should be visited? ");  

  %Initalization of variables
  if ( !exist("numberOfTowns", "var") == 1 )
    numberOfTowns = 10; %Default value for numberOfTowns
  endif

  %Distances matrix
  distances = randi([0, 100], numberOfTowns, numberOfTowns); %initialize distances matrix
  distances (logical(eye(numberOfTowns))) = 0; %Make diagonal zeros

  %Towns List
  townsList = 1: numberOfTowns; %initialize townsList
  townsList = randperm(length(townsList)); % shuffle the vector

  %Points of towns
  townsPointsX = randi ([0, 100], 1, numberOfTowns);
  townsPointsY = randi ([0, 100], 1, numberOfTowns);

  plot (townsPointsX, townsPointsY, 'or');
  hold on

  for ( i = 1:(numberOfTowns - 1) )
    plot ( [ townsPointsX (townsList (i)) townsPointsX (townsList (i + 1)) ], [townsPointsY (townsList (i)) townsPointsY (townsList (i + 1))], 'g' );
  endfor
  hold off
endfunction