Matlab: auto axis range when you have two plots in the same figure

Question

I use the following:

semilogy(x,P1);
hold on
semilogy(x,P2);    
hold off
axis([-inf,inf,0.0001,1])

No matter where I place the 'axis' command, it always give me a range suitable for P1, but not P2. Is there anything that can be done to have the auto ranging functionality to take both plots into account?

Answer 1

You could use the YLim property of your current axes, and set it to the minimal/maximal value between P1 and P2:

set(gca,'YLim',[min(P1,P2) max(P1,P2)]);

Is this what you mean?