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Hayao


Last seen: 5 months ago |  Active since 2015

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Cannot save a matrix into a csv file correctly
So I have a matrix with doubles inside like this 0.001　　9.86543... 0.002　　5.26811... 0.003　　4.91702... and so on. Using wri...

5 months ago | 1 answer | 0

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Store structure output into an array that you can index
I used a [X,fval,exitflag,output] = fmincon(fun,...) for global optimization that is in a parfor loop. In each loop, I get an "...

1 year ago | 1 answer | 0

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Global fitting two functions with shared parameters and variable, which fits two different data sets, respectively
I recently asked a similar question here: https://www.mathworks.com/matlabcentral/answers/1904370-global-fitting-of-two-differe...

1 year ago | 1 answer | 0

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Global fitting of two different function with shared parameters on two different data sets
I am trying to generate a script to fit two different (tediously long) functions that describes two different properties of a ce...

1 year ago | 1 answer | 0

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"Vectorization" of a script with a matrix
Dear all, I am trying to make a code that does certain calculations on a (very large) symbolic matrix as fast as possible. ...

6 years ago | 0 answers | 0

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I know gpuarray could improve for large sized matrix multiplication, but does it also improve if it has very large symbolic elements?
Dear all, Just as the question says, I know that gpuarray could improve large sized matrix multiplication. However, what if I...

6 years ago | 1 answer | 0

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Help reducing memory usage during large matrix multiplication
I have a certain 343-by-343 matrix V3 and a certain 343-by-1 vector V2 produced by certain algorithm and I want to do the follow...

6 years ago | 1 answer | 0

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Problem with cell array indexing when using parfor
Dear all, I'm try to do certain calculation that automatically generates a certain (large) matrix for each iteration and calc...

6 years ago | 1 answer | 0

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Question


Convert 3D cell array (with 3D vector in each cell) into a single matrix
I have a n-by-n-by-n cell array, where each cell contains a vector of 3D coordinate. I want to convert this 3D cell array into a...

6 years ago | 1 answer | 0

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Question


Producing a matrix from particular calculations from 3D cell array (of vectors)
Dear all, I was wondering if there is a way to produce a matrix consisting of distance between all possible combination of two v...

6 years ago | 0 answers | 0

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"To RESHAPE the number of elements must not change" error during plot
Dear all, I have a function (1x1 symfun) S4(t) with a variable of t. It's a very very long expression so I cannot write them ...

7 years ago | 1 answer | 0

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Setting assumptions for a function when solving system of ODEs
I have a following code below that is supposed to solve a dynamic system. I am trying to restrict X3(t) to be less than or equa...

7 years ago | 1 answer | 0

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Solving a system of nonlinear inhomogneous ordinary differential equations?
Hello everyone, I am planning to solve an extremely large nonlinear inhomogeneous ordinary differential equations (20 and more!)...

8 years ago | 0 answers | 0

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Why can't I solve eigenvector correctly? (eigenvalue problem)
The following matrix H is composed of two different constant a and b: a, b, 0, 0, 0, b b, a, b, 0, 0, 0 0, b, a, b, 0, 0...

8 years ago | 1 answer | 0

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Fitting curves with several complicated conditions
I have a system of 26 (linear, nonhomogeneous, ordinary) differential equations that looks like this (in matrix form): X'(t) ...

8 years ago | 0 answers | 0

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ezplot fails to plot
I am currently working on a very complicated plot obtained from solving system of 25 differential equations. The resulting pl...

8 years ago | 1 answer | 0

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Question


Efficient way of calculation matrix exponential in matlab
I am currently trying to solve a matrix exponential of a matrix that has the form of [a 0 b 0] [0 c 0 d] [e 0 f g] ...

8 years ago | 2 answers | 0

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MATLAB fails to solve a system of seventeen ODE in matrix form
Hello, I have recently downloaded the trial version of MATLAB with symbolic math toolbox in order to solve a system of seventeen...

8 years ago | 0 answers | 0

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Solving a system of differential equation numerically but with constants
Hello, I am asking this question before I buy MATLAB to make sure that I can get a solution of a problem (so that I won't be ...

8 years ago | 1 answer | 0

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