plotting nullclines in matlab

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Alex Masciovecchio
Alex Masciovecchio 2020-9-27
评论： David Goodmanson 2020-9-28
beta = 0.0004 ;
k = 4000 ;
delta = 0.0225;
S = [0: 150];
I1 = (1-(S/k))/(1/k + beta);
plot(S,I1)
hold on;
y = ylim ;
plot([50 50],[y(1),y(2)],'-.g')
xlabel('S');
ylabel('I');
title('Phase Plane Plot');
plot(S(51),I1(51),'r*')
legend('S Nullclines','I Nullclines','Equilibrium Point');
hold on;
i was wondering if this code made sense
  1 个评论
David Goodmanson
David Goodmanson 2020-9-28
Hi Alex,
could you post the original equations that this is based on?

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