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**Content Feed**

Sensitivity analysis using MATLAB

This might help, please take a look: http://malthus.micro.med.umich.edu/lab/usadata/

1 year ago | 1

Question

How to solve system of ODEs with constant and time-varying coefficients?

I have been trying to solve a system of ODEs in which one coefficient (d1) is a vector and all others are constant. The coeffici...

1 year ago | 0 answers | 0

### 0

answersQuestion

Break in the title

How can I break this title into multiple lines? The other examples on mathworks mostly deal with sentences in the title or may b...

3 years ago | 1 answer | 0

### 1

answerQuestion

Error in solving system of two reaction-diffusion equations?

Hello there, I have a system of two reaction-diffusion equations that I want to solve numerically (attached is the file). How...

4 years ago | 2 answers | 0

### 2

answersQuestion

Saving .fig files as a .pdf file

Hello, I am using Matlab 2016a on Mac. So far I have been exporting .fig files as eps to use them in a LaTeX document and I n...

5 years ago | 2 answers | 0

### 2

answersQuestion

MATCONT- Error using odearguments

Hello there, My ultimate goal is to do a bifurcation analysis of my system for which I started to use Matcont. It gave me var...

5 years ago | 0 answers | 0

### 0

answersQuestion

Trouble with compiler for MATCONT

I am using Matlab2016a on Mac 10.12 Sierra. I am trying to use MATCONT which is a package for bifurcation diagrams in Matlab. I ...

5 years ago | 1 answer | 0

### 1

answerQuestion

Getting subscripted dimension error while saving a variable in a loop. Now sure what my mistake is!

I am getting the subscripted dimension mismatch error. The error occurs after first iteration is complete. Not sure where I am g...

6 years ago | 1 answer | 0

### 1

answerQuestion

How can I treat the final time of the ode solver a variable? Please read the question for detail.

Below is the main file in which I solve an ode. I have attached the parameter (mu, K, d1) files and the file (para_1d.m) in whic...

6 years ago | 1 answer | 0

### 1

answerQuestion

variable coefficients-help needed please!!!

let me write the exact code i am using: %%%%%funl12.m%%%%%%%%% function dy = funl12(t,y) global k1 k2 k3 mu d1...

6 years ago | 2 answers | 0

### 2

answersQuestion

How to add arrows to solution trajectories using ode?

￼I have a system of two odes and i want to plot the phase portrait with arrows and clearly representing the stable and unstable ...

7 years ago | 1 answer | 0

### 1

answerQuestion

Trouble plotting right phase portraits!

I have a system of 2 non linear first order Ordinary Differential Equations with constant coefficients. I am trying to draw the ...

7 years ago | 0 answers | 0

### 0

answersQuestion

How to force the ode solver to stop when a periodic solution is reached?

Hello, I am solving a system of 4 non linear ODEs with periodic coefficients of period one year. I want the ode solver to che...

8 years ago | 0 answers | 0

### 0

answersQuestion

Problem regarding a periodic solution not being saved properly

Hello! I am working on a problem where I have to solve an ODE for time of 10 years and then check when and where that solution b...

8 years ago | 1 answer | 0

### 1

answerQuestion

How to find equilibrium points of a system of 5 non linear ordinary differential equations???

Hello all, I have a system of 5 non linear ordinary differential equations with variable coefficients (with at least 3 parame...

8 years ago | 1 answer | 0

### 1

answerQuestion

How to pick random number?

Hi, Please forgive me if I am asking a basic question. I want to pick random number from the set {2,3}. It should either pick 2 ...

8 years ago | 1 answer | 0

### 1

answerQuestion

how to maintain continuity and periodicity of a function

I have a parameter (piece wise constant over each season of the year). I used 'pchip' to interpolate this function: functio...

9 years ago | 1 answer | 0

### 1

answerQuestion

How to smooth seasonal averages into a continuous function?

Hi, I have a system of four non linear ordinary differential equations: dy(1,1) = (k1(t).*(y(4)-y(1)).*y(3))./(y(2)+y...

9 years ago | 1 answer | 0

### 1

answerQuestion

how to reset/change the initial data?

Hi there, I am working on a non linear system of 4 ordinary differential equations with time varying coefficients. I solved them...

10 years ago | 1 answer | 0

### 1

answerQuestion

System of ordinary differential eqns-reset initial data

Hi, I have non linear system of 4 ordinary differential equations with time varying coefficients. I solved them numerically usin...

10 years ago | 0 answers | 0

### 0

answersQuestion

variable coefficient

Hi, I have a system of 4 non linear ODEs. I solved them using ode15s and it worked perfectly. But i used constant coefficients a...

11 years ago | 1 answer | 0

### 1

answerQuestion

odeevent

Hi there, I have an odeevent sub-routine: function [x,isterm,dir] = odeevent(~,y,k1,k2,k3,mu,d1,d2,r,K,k,alpha,gamma,n) dy...

11 years ago | 1 answer | 0

### 1

answerQuestion

steady state criterion

Hi, I have a system of 4 ODE's and I solved it by using ode15s solver. But I want to stop simulations when the steady state is ...

11 years ago | 2 answers | 1