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Question
Solving partial differential equation with variable coeffcients
Hi all, Can we solve pde of the form using the pde tool bok of MATLAB? Note that A and B are functions of x.
plus de 5 ans il y a | 1 réponse | 0
0
réponseQuestion
All solutions are NaN in my Method of lines code. Please help.
Dear all, I am trying to implement Method of lines (MOL) to solve my transient PDE. My solutions are all NaN except for the ini...
plus de 6 ans il y a | 1 réponse | 0
0
réponseQuestion
Problem with finite difference method.
I am trying to implement Finite difference method. I created the tri diagonal matrix, then solved using the command y=A\b. But t...
plus de 6 ans il y a | 1 réponse | 0
0
réponseConfusion on event function
In Walter's code, we need to guess the end time? I mean do we need to guess the time when the first event would occur?
environ 7 ans il y a | 1
Question
Confusion on event function
Hi all, I want to incorporate an event into my ode45 code. The event is that every time the value y reaches 1 (initial condition...
environ 7 ans il y a | 2 réponses | 1
2
réponsesQuestion
Is there any way I can ensure that the numbers generated in ode45 are positive?
Here is my code. Many numbers generated in the solution are negative and there are a lot of NaNs too. %setting up th...
environ 7 ans il y a | 1 réponse | 0
0
réponseQuestion
Dear all, Help needed.
I have a data which I have generated as a solution to an ODE. It contains information about the states of 10 oscillators at vari...
environ 7 ans il y a | 1 réponse | 0
0
réponseQuestion
Is it possible to multiply a 3D matrix with a coumn vector?
I have a 3D matrix with three rows and three columns. I want to multiply this matrix with a column vector of 3 rows. How can it ...
plus de 8 ans il y a | 4 réponses | 0
4
réponsesQuestion
Evaluating a matrix at different time steps
Dear all, I have a matrix which is a transition matrix. I need to calculate the time evolution of the associated probability di...
plus de 8 ans il y a | 2 réponses | 0
2
réponsesQuestion
Dear all, what is the meaning of including number of iterations within ode45 syntax?
What is the meaning of the followig command? [t,theta]=ode45(@F,tbegin,tEnd,thetaInit,nIters,p) ...
presque 9 ans il y a | 1 réponse | 0
1
réponseQuestion
Solving systems of n ODEs in matlab.
Hi all, I am trying to simulate Kuramoto oscillators in matlab. I have simulated systems with 3 equations(such as Lorenz eqns, R...
environ 9 ans il y a | 1 réponse | 0
0
réponseQuestion
Not enough input arguments ode45
Hi all, I have been trying to understand the use of ode solvers in MATLAB. In the process, I started with first order equations...
environ 9 ans il y a | 1 réponse | 0
