NOT ENOUGH INPUT ARGUMENTS

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JK
JK 2015-4-29
编辑: Mischa Kim 2015-4-29
Hi everyone, I'm trying to solve a system of 5 ODEs with intial conditions using ode45. I'm getting the error message of "Not enough input arguments". I've tried looking up what that means, but I'm still confused. If anyone could help me out with this, that would be great!
This is the main body (saved as ode.m)
function f = ode(t,Y); r=0.2; M=300;
aa=1;
muf=5; aact=1; af=1; mu1=0.1; mu2=0.5; lam = 0.23; tau = 0.36; f=zeros(5,1); f(1,1) = r*Y(1)*(1-Y(1))-lam*Y(1)*Y(2)-aa*Y(5)*Y(1); f(2,1) = lam*Y(1)*Y(2) - muf*F-af*Y(4)*Y(2)-aa*Y(5)*Y(2); f(3,1) = Y(3)*(1-Y(3))-aact*Y(3)*Y(2); f(4,1) = aact*Y(3)*Y(2) - Y(4)*(mu1+tau); f(5,1) = tau*Y(4)-mu2*Y(5); end
And this is the execution script
clear all close all clc
[tv,Yv]=ode45(@ode,[0 1],[0 1 0]); plot(t,Y(:,1),t,Y(:,2),t,Y(:,3),t,Y(:,4),t,Y(:,5))
Thank you

回答(1 个)

Mischa Kim
Mischa Kim 2015-4-29
编辑:Mischa Kim 2015-4-29
JK, your ode call says that the state vector has only three components
[tv,Yv] = ode45(@ode,[0 1],[0 1 0]);
whereas the ode file says that there are five:
f(5,1) = tau*Y(4)-mu2*Y(5);
In addition:
  • F is not defined in the ode function
  • Either change tv to t or the other way around. Same applies for Y

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