plot points in a different colour co ordinates

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Ergahani 2013-2-19

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/64161-plot-points-in-a-different-colour-co-ordinates

 x = randi([-35,165],[2000,1]);
      x = x';
      y = randi([-20,80],[2000,1]);
      y = y';
      plot(x,y,'kx','LineWidth',2,'MarkerSize',10)
I can also plot points with different colours within two circles.
      num1 = 2000;
      radius = 30;
      theta = rand(1,num1)*(2*pi);
      r = sqrt(rand(1,num1))*radius;
      xCor = r.*cos(theta);
      yCor = r.*sin(theta);
      plot(xCor,yCor,'rx','LineWidth',2,'MarkerSize',10)
      subplot(1,1,1)
      hold on;
      num = 1000;
      rad = 10;
      theta = rand(1,num)*(2*pi);
      r = sqrt(rand(1,num))*rad;
      xCor2 = r.*cos(theta);
      yCor2 = r.*sin(theta);
      plot(xCor2,yCor2,'gx','LineWidth',2,'MarkerSize',10)