MATLAB: Matlab animation for x y plot that varies with time.

animationforloop

Hello, I have a simple function that varies with time. The function is y=mx however, m varies with time. at 10 sec it is 3 and at 20 sec it is 5. I want to have animation xy plot that shows how xy plot varies with time. How can I put a clock at the top of the graph that shows the time? This is the code I tried.
    clear all
  clc
x = 0:10:(100);
%at 10 sed
y=3*x;
%at 20 sed
y=5*x;
%at 50 sed
y=7*x;
slope=[3 5 7]
for k=1:3
    y(k,:)=slope(k)*x;
end
for i=1:3
      hold all
      plot(x,y(i,:))
     pause(0.5)
%    
end
Any help is appreciated.
Thanks

Best Answer

slope_times = [0, 10, 20, 50];
slope       = [1,  3,  5,  7];  %you need to recheck the initial slope
x = 0:10:100;
times = linspace(slope_times(1), slope_times(end));
m = interp1(slope_times, slope, times);
for k = 1 : length(times)
  y = m(k) * x;
  plot(x, y);
  title( sprintf('t = %.1f', times(k)) );
  hold all
  pause( 0.5 );
end
hold off
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