Second Order ODE Error (Error in ode45 (line 115))
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Despite my best attempts to debug this small bit of code, I can't seem to find a solution for the error that I am receiving.
Are my ode45 parameters in the wrong form?
This is all one file:
clear all
%-----------------------------
xo = [1; 0.1];
tspan = [0 20];
[t,x]=ode45('f',tspan,xo);
plot(t,x(:,1));
%-----------------------------
function v = f(t,x)
m = 10; k = 25;
alpha = 250;
Fo = 150;
w = sqrt(k/m);
ceq = sqrt(q*m*alpha*Fo/m/3/pi);
v =[x(2); x(1).*-k/m+ x(2).*-ceq/m + Fo/m*cos(w*t)];
end
%-----------------------------
Errors Output:
Error in ode45 (line 115)
odearguments(FcnHandlesUsed, solver_name, ode, tspan, y0, options, varargin);
Error in Chase_Harmon_HW_6_ME_3220_003_Extra_Credit_Problem_3 (line 5)
[t,x]=ode45('v',tspan,xo);
回答（1 个）
KALYAN ACHARJYA
2019-4-4
编辑：KALYAN ACHARJYA
2019-4-4
In the function file following line q is not defined
ceq = sqrt(q*m*alpha*Fo/m/3/pi);
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2019-4-4
2019-4-4
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