not enough input argument error

1 view (last 30 days)
aubelee
aubelee on 21 Apr 2021
Commented: Stephan on 21 Apr 2021
I am trying to run this code, however, it seems that it's giving me a not enough input error (Not enough input arguments.
Error in repressilator (line 7), m1 = -y(1) + alpha/(1+y(6)^n) + alpha0;). Could someone please help me to run this?
function ydot=repressilator(t,y,p)
alpha0 = 1;
n = 2.0;
beta = 5;
alpha = 1000;
% order of species; y = [m1 p1 m2 p2 m3 p3]
m1 = -y(1) + alpha/(1+y(6)^n) + alpha0;
p1 = -beta*(y(2) - y(1));
m2 = -y(3) + alpha/(1+y(2)^n) + alpha0;
p2 = -beta*(y(4) - y(3));
m3 = -y(5) + alpha/(1+y(4)^n) + alpha0;
p3 = -beta*(y(6) - y(5));
ydot = [m1; p1; m2; p2; m3; p3];
timespan=[0 15];
y0 = [0 1 0 1 0 1];
[t,y] = ode45(@repressilator,timespan,y0);
figure()
plot(t,y)
xlabel('Time')
ylabel('Amount')
legend('m1','p1','m2','p2','m3','p3','Location','SouthEast')
figure()
plot(y(:,1), y(:,2))
xlabel('Amount m1')
ylabel('Amount p1')

Accepted Answer

Stephan
Stephan on 21 Apr 2021
timespan=[0 15];
y0 = [0 1 0 1 0 1];
[t,y] = ode45(@repressilator,timespan,y0);
figure()
plot(t,y)
xlabel('Time')
ylabel('Amount')
legend('m1','p1','m2','p2','m3','p3','Location','SouthEast')
figure()
plot(y(:,1), y(:,2))
xlabel('Amount m1')
ylabel('Amount p1')
function ydot=repressilator(~,y)
alpha0 = 1;
n = 2.0;
beta = 5;
alpha = 1000;
% order of species; y = [m1 p1 m2 p2 m3 p3]
m1 = -y(1) + alpha/(1+y(6)^n) + alpha0;
p1 = -beta*(y(2) - y(1));
m2 = -y(3) + alpha/(1+y(2)^n) + alpha0;
p2 = -beta*(y(4) - y(3));
m3 = -y(5) + alpha/(1+y(4)^n) + alpha0;
p3 = -beta*(y(6) - y(5));
ydot = [m1; p1; m2; p2; m3; p3];
end
  2 Comments
Stephan
Stephan on 21 Apr 2021
See my edited answer - the code works

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by