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Solving an integration problem at specific time points
Hello, I am interested in solving this equation below where I have specific time points that correlate with a gp value. I need ...
environ 6 ans il y a | 1 réponse | 0
1
réponseQuestion
Error using bvp4c: "Warning: Unable to meet the tolerance without using more than 5000 mesh points. The last mesh of 4921 points and the solution are available in the output argument."
Hello, I'm using bvp4c to solve for a reaction-diffusion equation. When I set the initial concentration to 100, I get this erro...
environ 7 ans il y a | 1 réponse | 0
1
réponseQuestion
Plot u vs. t with PDEPE. "Index exceeds matrix dimensions."
Hello, I can't seem to figure out how to plot u (concentration) vs. t (time) at a specific x (distance). function simple...
plus de 7 ans il y a | 1 réponse | 0
0
réponseQuestion
Plot at t = 0, 0.001, 0.01, and 10 in one plot
Hello, I'm solving for a time dependent pde. I was wondering how do I plot multiple lines on the same plot at specific time p...
plus de 7 ans il y a | 1 réponse | 0
1
réponseQuestion
How to determine where plot/curve reaches 0?
Hello, I have a concentration vs distance plot and was wondering how can I determine where the concentration reaches 0 at max...
plus de 7 ans il y a | 1 réponse | 0
0
réponseQuestion
Error using pdepe - Spatial discretization has failed. Discretization supports only parabolic and elliptic equations, with flux term involving spatial derivative.
Hello, I'm using pdepe to solve for a reaction-diffusion equation. When I set the initial concentration to anything between ...
plus de 7 ans il y a | 1 réponse | 0
1
réponseQuestion
Plot multiple lines on the same plot at specific time points
Hello, I'm solving for a time dependent pde. I was wondering how do I plot multiple lines on the same plot at specific time p...
plus de 7 ans il y a | 1 réponse | 0
0
réponseQuestion
Adding a known velocity (convection) term to reaction diffusion equation using bvp4c
I am trying to add a known velocity (10 m/s) to my steady state reaction diffusion equation although I'm a bit confused how to g...
plus de 7 ans il y a | 1 réponse | 0
0
réponseQuestion
How to plot parameters within bvp4c
Hello, I'm solving for a reaction diffusion equation. I followed examples on how to plot the solution of differential equatio...
plus de 7 ans il y a | 1 réponse | 0
0
réponseQuestion
What does this code mean?
Hello, I'm still fairly new to MATLAB. I was looking through examples of how to plot my time dependent solution from t = 0, t...
plus de 7 ans il y a | 1 réponse | 0
1
réponseQuestion
bvp4c setup for second order ODE
<</matlabcentral/answers/uploaded_files/121925/Eqns.PNG>> Hello, I'm trying to solve for this second order ODE in steady stat...
plus de 7 ans il y a | 1 réponse | 0
1
réponseQuestion
Second order ODE - Error in using ODE45?
<</matlabcentral/answers/uploaded_files/121721/Eqns.PNG>> Hello, I'm trying to solve the second order differential equation (...
plus de 7 ans il y a | 1 réponse | 0
