Answered

How can I return the values of a loop

You are computing k once for each value of i and overwriting it. If I understand what you want, try: i = 1:5; j = 0:5; k...

How can I return the values of a loop

You are computing k once for each value of i and overwriting it. If I understand what you want, try: i = 1:5; j = 0:5; k...

4 years ago | 0

| accepted

Question

Create an array of n function handle

Hello, How can I create a set of ode equations? Example: fun1 = @(t,x,k) x-k; I want to generate a function of n e...

4 years ago | 1 answer | 0

Question

Struggling at 'Events' of ODE45

Hello, I have a ODE and need to compute the "exact" time and values of y at y(2)=0 and I'm using ode45 and 'Events'. When ...

5 years ago | 1 answer | 0

Question

Struggling at events of ode function

Hello, I'm trying to use events function to find the coordinates of a ODE function of n variables. What I want is to find the...

5 years ago | 0 answers | 0

Answered

Can You Explain This Weird Behavior

I'm not an expert, but try to never use known MATLAB functions. To check if a name is already used, go to command whindow and ty...

Can You Explain This Weird Behavior

I'm not an expert, but try to never use known MATLAB functions. To check if a name is already used, go to command whindow and ty...

5 years ago | 1

Question

How to automatically choose to compute for or parfor loops

Hi, I wonder if there's a way to specify if I want to compute with a normal for or with a parfor. What I don't want is to...

5 years ago | 1 answer | 2

Question

How to vectorize this simple for-loop

Hello, I'm trying to vectorize something like this: z=zeros(3); x=[1 2 3]; y=x; for i=1:length(x) %or y, d...

5 years ago | 1 answer | 0

Question

How to group data in cells?

Hello, My code works on a data file. By loading the file, I have a 5xn matrix (n is approximately BIG). Each column represent...

5 years ago | 0 answers | 0

Question

Problem scattering high amount of data

Hello, I'm trying to scatter more than 80Mb of data in one scatter figure and I see nothing but blue. I'm trying to get small...

5 years ago | 1 answer | 0

Question

Which plot do I need?

Hello, I'm trying to plot in 2D some points and I want to color them depending on a logic (1 or 0) classification. I'll ex...

5 years ago | 3 answers | 0

Question

How to automatically stop a function execution if it's not running right?

Hi, I have a problem with running my code. I'm numerically solving a Poincaré map of a dynamical system several times with di...

5 years ago | 0 answers | 0

Question

How can I get a derivated function df/dt?

Hello, I'm trying to calculate derivate functions like z(t)=cos(x(t))+y(t)^2 and I expect answers like z'(t)=-x'(t)*sin(x(t))...

5 years ago | 1 answer | 0

Question

Struggling with ode45 MATLAB function

Hello everybody, I'm trying to introduce my function into ode45 to solve it but it messages me "Not enough input arguments". ...

5 years ago | 1 answer | 0

Question

How to speed up my while loops

Hello, I have been looking for ways to speed up my code because sometimes I spend some hours at running once MATLAB. I've rea...

5 years ago | 1 answer | 0

Question

How can I speed up importing large .d files?

Hi, soon I'll have large files, about 50000x6 (more than one of them) and I'll have to work on them several times to plot di...

5 years ago | 2 answers | 0

Answered

Why do I get different outputs at different run's?

Thanks to everybody for your comments. I see global variables are a mess. I finally solved the problem this way: fun goes from ...

Why do I get different outputs at different run's?

Thanks to everybody for your comments. I see global variables are a mess. I finally solved the problem this way: fun goes from ...

5 years ago | 0

| accepted

Question

Why do I get different outputs at different run's?

Hi, there's something very odd happening with my code. I'm doing three times the same calculations for three different input va...

5 years ago | 1 answer | 0

Question

Am I overwriting data?

Hi, I need to get three different orbits and I think I might be overwriting data because when I plot them together I just get...

5 years ago | 1 answer | 0

Question

How to plot different length vectors

Hi, I need to plot different orbits in one figure. The coordinate vectors are result of a Runge-Kutta 7-8 so I can't kno...

5 years ago | 1 answer | 0