MATLAB: How to mirror a plot in x and y axis.

axisflippolygon

I want to mirror a plot in x and y axis so i forms a symmetrical shape made of four of the same randomly generated polygon.
   prompt = {'Enter Number of vertices:',}
   numberOfVertices = str2num(cell2mat(inputdlg(prompt, 'enter a number', 5)))
  %numberOfVertices = 7; % Fixed at 7 for this demo.
  coordinates = rand(numberOfVertices, 2);
  coordinates(1,:) = [0, 0]; % Force first coord to 0,0
  coordinates(end+1,:) = [0, 0]; % Force last coord to 0,0
  plot(coordinates(:,1), coordinates(:,2));
  grid on;
  randomColor = rand(1,3);
  patch(coordinates(:,1), coordinates(:,2), randomColor); % Can use fill() also.
  set(gca, 'xdir', 'reverse');
  grid on;

Best Answer

*mirror both in x axis and y axis
hold on
   plot(-coordinates(:,1), -coordinates(:,2));
mirror only in x axis
   hold on
       plot(coordinates(:,1), -coordinates(:,2));
mirror only in y axis
   hold on
       plot(-coordinates(:,1), coordinates(:,2));
*
Related Question