Community Profile # Elia Paini

Last seen: 6달 전 2021년부터 활동

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Why trust-region algorithm is not available in Simulink?
Hi, I'm trying to link a mathlab model which solves a system of non linear equations by using fsolve and trust region algorithm,...

7달 전 | 답변 수: 0 | 0

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How to load parameters in different format?
Hi, I'm interested in code optimization. Since I have many parameters, vectors and matrices to be initialized in my code, I'm lo...

8달 전 | 답변 수: 0 | 0

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How to improve this function execution?
Hi, I have a code that includes a complex function which returns a column vector. The function can be explained in this simpli...

8달 전 | 답변 수: 1 | 0

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How to enable parallel computing?
Hi, I'm trying to improve fsolve execution with parallel computing, by implementing this instruction: options = optimoptions('f...

8달 전 | 답변 수: 0 | 0

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How to have this title graph?
Hi, I have to plot a graph displaying in the title two parameters each iteration, "cycle" and "minute", with the values after "=...

약 1년 전 | 답변 수: 1 | 0

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I need a function which returns 0 if the argument is negative
Hi, I need a function in Matlab which returns 0 if the argument is negative: f(x) = 0 if x < 0 f(x) = f(x) if x > 0 ...

약 1년 전 | 답변 수: 1 | 0

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How to switch to this graph? Mathematical question
Hi, I have a bit complicated question about a way to obtain a graph from a set of data. I have a code that return a solution o...

1년 이상 전 | 답변 수: 2 | 0

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How to get this while cycle?
Hi, I'm trying to get a while cycle which checks convergence every iteration. Within the cycle, I'm solving a system which ret...

1년 이상 전 | 답변 수: 2 | 0

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How can I do this iteration?
Hi, I have a simple question related to a problem. I have to make an iterative code which updates values of some hypothesized ...

1년 이상 전 | 답변 수: 1 | 0

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How to solve this simple matricial system?
Hi, how can I solve this simple system in Matlab? A*u = h*G A: 4x4 u: unknowns vector, but it should be 4x1 h: scalar G...

2년 이하 전 | 답변 수: 2 | 0

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How can I "simplify" the resolution of this system of odes?
Hi, as you can see in the attached file, I've a system of second order ODEs with BCs. I tried to solve it with bvp4c, firstly c...

2년 이하 전 | 답변 수: 0 | 0

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How to solve a system of ODEs with BCs, without bvp4c?
Hi, I solved a system of ODEs with BCs, by using bvp4c. The system is a bit complicated, consisting of 21 non linear equations,...

2년 이하 전 | 답변 수: 0 | 0

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How can I optimize initial guess of a solution?
Hi, I solved a system of non linear ODEs with bvp4c. The system is a bit complicated, since it contains 17 equations with 17 va...

2년 이하 전 | 답변 수: 0 | 0

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How can I solve this system of ODEs involving both time and space?
Hi, I have this complicated system of ODEs (see attached file), whose equations depend on time and space. I have no idea how ...

2년 이하 전 | 답변 수: 1 | 0

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How can I insert this boundary condition?
Hi everyone, I have an ODE system with several variables, like this: y1' = f (y1,y2) y2' = g (y1,y2) I'm solving it with...

2년 이하 전 | 답변 수: 0 | 0

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How to solve this ODE system which involves these integrals?
Hi, I'm trying to solve the following (simplified) ODE system (see attached file). Where X1 and X2 are my functions, z is the i...

2년 이하 전 | 답변 수: 1 | 0

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How can I improve accuracy using bvp4c?
Hi, I solved an ODEs system with BCs. The system is a bit complicated, it consists of 10 second order equations (thus, 20 first ...

2년 이하 전 | 답변 수: 0 | 0

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How to plot 3 graphs in 1 figure?
Hi, I want to plot 3 graphs in one figure, arranging them two on the left and one on the right. With subplot, I managed to arra...

2년 이하 전 | 답변 수: 1 | 0

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How should I get multiple solutions related to different BCs in this script?
Hi, I'm solving a system of ODEs with BCs, with bvp4c function. My simplified script is as follows: rmesh = ... ...

2년 이하 전 | 답변 수: 0 | 0

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What does it represent the second vector in solinit?
Hi, I solved a system of ODEs second order with BCs with bvp4c. I have 8 variables (4 are the functions I'm interested, y(x), ...

2년 이하 전 | 답변 수: 0 | 0

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Hi, I solved correctly a system of ODE second order with BCs, with the instruction bvp4c. However, I have some questions about ...

2년 이하 전 | 답변 수: 1 | 0

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Solving a system of ODE with BCs
Hi, I'm trying to solve a system of 2 ODE with boundary conditions. The integration variable is r, which is the sferical coord...

2년 이하 전 | 답변 수: 1 | 0

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Solving an ODE second order
Hi, I have to solve an ODE second order in Matlab, like this: a*y''(x)=b Where x is the space coordinate, a and b are costan...

2년 이하 전 | 답변 수: 1 | 0

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How can I use ode15s with a tspan of two elements?
Hi, I'm using the function ode15s to solve ODE. I don't understand why, with a vector of time with only 2 elements, Matlab autom...

2년 이하 전 | 답변 수: 1 | 0

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