I have an old version of Matlab (2008), when I try to create an ODE function and solve it, it does not work and errors appear as follows: >> syms y(t) ??? Undefined function or method 'syms' for input arguments
마감:MATLAB Answer Bot2021년 8월 20일 Hello, I am currently trying to solve an ODE for two differential equations. These equations represent body mass and body energy in an animal. I have quite a few parameters necessary to solve these, one being feeding ...
MATLAB calls the ODE function that you pass intoode45with a vector of values for the second input. If you're trying to solve this for each value of gamma in turn, use aforloop over the elements of gamma. Define f using each element from gamma in turn then callode4...
The numerical ODE solvers pass a time scalar and a vector to the ODE functions they integrate, in that order, so the function must account for them. Also, by default, MATLAB will create a row vector for the‘dpos’ How to Get Best Site Performance Select the China site (in Chine...
Open in MATLAB Online Your function is nonlinear, and most nonlinear ODES do not have analytical solutions. Try this: ThemeCopy syms y(t) A B C D E Y Dy= diff(y,t); D2y= diff(y,t,2); ode = A*D2y + B*sin(C*y) + D*Dy == 0; [VF,Subs] = odeToVectorField(ode) ...
How to solve ODE match problem ? globalr; y0=zeros(1,r^3); t=[0,10]; [x,y]=ode23('diffusion',t,y0); And the diffusion function is(I've simplified the code) ThemeCopy function[ c ] = diffusion(t,f) globalr; forx=0:r-1...
How to handle discrete, non-periodic right-hand... Learn more about ode15s, differential equations, numerical integration, discontinuity MATLAB, Simulink
have told us that you have 4 coupled ODEs, where one coefficient will depend on the final solution. (This oviously breaks the causality of physics, and mathematically it doesn't make much sense as an integration with respect to time - what says tha...
How to solve ODEs that are a function of the derivatives of the state variablesThe notation is ...
Dear comsolers, here is an example on how to loop simulations. I'll let you decode it. 'Preprocessing' that I did before the loop: 1. Build a model in Comsol (attached). 2. Save As Model M-File (attached). 3. Open .m in Matlab and look for the line that needs to be modified...