A way to plot legens for better performance?

Question

William 2011-9-17

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/16056-a-way-to-plot-legens-for-better-performance

Hello all, I am plotting data in a for() loop such that the data displays as a movie.

When I include plotting the legend, the plot times are considerable slower and the whole plot flashes blank each time the legend is plotted.

Is there a better way to do this. I am on a MacBook Pro and I think I have read elsewhere that mac version of MatLab features slow plots.

code - the legend plots are on subplot 3 and 4:

for i = 1:1:length(Y)
      ti = time(i);
      figure(18);
      clf;
      subplot(4,1,1);
      plot(Y(1,i),solution_heigth(i),'o','MarkerSize',15);
      hold on
      plot(Y(1,i),-epsilon,'o','MarkerSize',15);
      plot(Y(1,i),-epsilon,'x','MarkerSize',15);
      text(Y(1,i),-epsilon*.95,['pos = ',num2str(Y(1,i)),' vel = ',...
          num2str(Y(2,i))]);
      plot(x,epsilon*cos(x-Ft(i)));
      title([num2str(ti),' square wave, delta = 2.9, omega = pi']);
      subplot(4,1,2)
      plot(Y(1,1:i),Y(2,1:i));
      hold on
      title('phase space');
      xlabel('x');
      ylabel('dx/dt');
      drawnow
      subplot(4,1,3)
      plot(time(1:i),Y(1,1:i),time(1:i),Y(2,1:i));
      hold on
      legend('position','velocity');
      title('x')
      subplot(4,1,4)
      plot(time(1:i),orbitEnergy(1,1:i),time(1:i),orbitEnergy(2,1:i),...
          time(1:i),orbitEnergy(3,1:i));
      hold on
      legend('kinetic','potential','total');
      title('energy');
      drawnow
end