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统计学

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Scaling variables for integration with ode15s
Hello, I am integrating a set of differential equations with ode15s and some of my variables have very different orders of magn...

2 years 前 | 1 个回答 | 0

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Constrained dynamic optimization with fmincon
Hello, I am trying to use fmincon to solve a dynamic optimization problem: where u are my control variables, x are my state...

2 years 前 | 1 个回答 | 0

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Unable to meet integration tolerances without reducing the step size below the smallest value allowed
Hello, I am integrating a series of ODEs and I run into the following warning that stops the integration: Warning: Failure a...

3 years 前 | 1 个回答 | 0

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Readability of matlab code
Hi, I am coding using matlab and have many functions, some of which have more than a dozen input arguments. The majority of th...

3 years 前 | 4 个回答 | 0

4

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Vectorize the loops within the function
Hi, I am trying to create a function for Lagrange's interpolation and I wanted to know if there is a way to vectorize it that ma...

5 years 前 | 1 个回答 | 0

1

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ode15s unable to meet integration
Hello, I am modeling a continously stirred reactor and some chemical reactions and trying to do a cyclic process, i.e. feed the...

5 years 前 | 0 个回答 | 0

0

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question about vectorization using indexes
Hello, I am trying to do the following operations in matlab but I have a problem with how to properly write my code using vector...

5 years 前 | 3 个回答 | 0

3

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sparse matrix operations to gain efficiency
[EDITED] Hello, I've never really used sparse matrices before but I was wondering if it would be useful in my case to imporve...

5 years 前 | 1 个回答 | 0

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Concatenate cells containing strings
Hello, I need to concatenate cells to obtain new strings within a new cell array. For example I have cells A and B A={'hel...

6 years 前 | 1 个回答 | 0

1

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Split character arrays at given column
Hello I have the following character array, val = 3×79 char array ' 0.24971474E+01 0.17808300E-02-0.78001300E-06 ...

6 years 前 | 1 个回答 | 0

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match values of cells to numbers
Hello, I have the following cell cell = 6×6 cell array {' A'} {'B' } {0×0 double} {0×0 double} ...

6 years 前 | 1 个回答 | 0

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minimization fmincon with ode
Hello, I am using fmincon to fit my model to data. I have a set of differential equations that give me the model results: dy...

6 years 前 | 1 个回答 | 0

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set fmincon function tolerance
Hello, I am using fmincon and I want to set the function tolerance and I thought that it meant that if |f(xi) – f(xi+1)| < Tol...

6 years 前 | 1 个回答 | 0

1

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Optmization with fmincon using an external software
Hello, I have a problem and I do not know how to solve it. I’ll try my best in explaining. I am optimizing an objective func...

6 years 前 | 0 个回答 | 0

0

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fprintf break line different arrays
[Edited] I use 2 arrays here as examples but I actually have several I have the following arrays: a=[1 2 3 4 5 6 7 8 ...

6 years 前 | 1 个回答 | 0

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add blank spaces in cell array
I have the following array ar= 0 1 0 0 0 0 0 0 0 0 0 0...

6 years 前 | 2 个回答 | 0

2

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Concatenate rows of cell into one column
Hello, I have one cell A of size nxm and I would like to convert it into a cell of size nx1. For example if A= { [1] [2...

6 years 前 | 2 个回答 | 0

2

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Vectorization of a nestled loop
I am trying to improve the overall performance of my code and I am learning about vectorization. I've read the documentation...

6 years 前 | 1 个回答 | 0

1

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Add values to vector
I have the following vectors A and B A= [20 80 -1 0.1 0.05 0.25 0.13 0.12 0.35 21 70 -1 0.1 0.2 0....

6 years 前 | 2 个回答 | 0

2

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