MATLAB: plot in a loop

问题

I've tried to do plot inside of a loop and it prints only the last plot.

How can i fix it?

I've tried to use hold on and drawnow after the plot definition but it didn't work.

This is my code:

for t=1:5
  alive = Game(World , Generations, speed);
  plot(hplot2,1:Generations,alive);
end

回答1:

hold on should work. Try this:

figure
hplot2=gca;
hold on
for t=1:5
    alive = rand(1,Generations);
    plot(hplot2,1:Generations,alive);
end

回答2:

Sticking in a "figure" has always worked for me.

for t=1:5
    alive = Game(World , Generations, speed);
    figure;
    plot(hplot2,1:Generations,alive);
end

回答3:

Since you are already passing the axes handle to plot, you only need to put something like pause(0.1) inside the loop, and your original source will work.

回答4:

you can also use figure(t) to have 5 different figures.

回答5:

If the function Game(World , Generations, speed) is a deterministic function - it gives the same output for every t. Therefore, every plot commands has exactly the same output and you cannot distinguish the first from the last plot.

Try plot a random series at each iteration (as in answer of shoelzer) and see if you see all 5 plots.

Additionally, you might want to use hold all instead of hold on: this way each plot will get a different color from the colormap.

来源：https://stackoverflow.com/questions/14407101/matlab-plot-in-a-loop