# Mohammad Shojaei Arani

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**Content Feed**

Question

Can we manipulate a file without opening it

Hello, I have a question which I explain in bellow. Consider the following loop: for i=1:10^6 A = Read a csv file; A = per...

7 dagar ago | 2 answers | 0

### 2

answersQuestion

How to analyze a csv (txt or xls) file without opening it

Hello, I have an optimization problem in which I need to simultaneously run it several times using par-for. The reason is that ...

7 dagar ago | 0 answers | 0

### 0

answersQuestion

How to vectorize a complex function?

Hello, I have a rather complex function but I need to vectorize it in order to be able to use a matlab optimization package. My...

8 dagar ago | 1 answer | 0

### 1

answerQuestion

apparently the command rmoutliers does not do the job correctly

Hello, It seems to me that the command "rmoutliers" has some problems. To make things clear I explain using an example as bello...

17 dagar ago | 1 answer | 0

### 1

answerQuestion

A problem with function handle

Hello, I have a simple problem but I do not understand why function handle behaves like this!!! I explain by a simple example i...

25 dagar ago | 1 answer | 0

### 1

answerQuestion

Symbolic dependency apparently sometimes gives wrong answers

Hello, I have a simple question but could not figour out how to tackle it by myself. Consider the following: syms p1 y f=[p...

ungefär en månad ago | 3 answers | 0

### 3

answersQuestion

A rather different stopping criteria for particle swarm

Hello, I am working on an optimization problem where the objective function is non-smooth and even worse, it is not defined...

2 månader ago | 0 answers | 0

### 0

answersQuestion

Inconvenience working with matlabFunction

Hello, One of you did kindly respond my question (my question was very similar to this one) but I again ran into problem and ne...

3 månader ago | 3 answers | 0

### 3

answersQuestion

Inconveniences working with matlabFunction

Hello, I think that I am repeating the same sort of question I bothered you yesterday but I did not expect to run into peoble...

3 månader ago | 1 answer | 0

### 1

answerQuestion

A MATLAB function with mixed scalar and vector as inputs fail

Hello, I have a question which I explain by a simple example first. Consider the matlab function H=@(x,x0,par1,par2)[x+par1 x...

3 månader ago | 1 answer | 0

### 1

answerQuestion

Opening or loading a rather complex dll file

Hello, I have downloaded a few matlab codes (which are about estimating the density and its higher order derivatives) whose ex...

3 månader ago | 1 answer | 0

### 1

answerQuestion

Surrogate optimization throws error when I try to use the vectorized option

Hello, Attemting to use vectorized option in surrogate optimization fails and I am not able to figour out the reason behind. I...

3 månader ago | 0 answers | 0

### 0

answersQuestion

Is it possible to implement optimization algorithms, especially particle swarm, with "dynamic bounds" in MATLAB?

Hello, I have a rather special optimization problem in which I found particle swarm a good solver. I know, roughly, where the o...

3 månader ago | 2 answers | 0

### 2

answersQuestion

An error due to output function

Hellow, I am getting an error message which I did not expect (I explain why). I am solving an optimization problem. When I use ...

3 månader ago | 1 answer | 0

### 1

answerQuestion

Parallel computing seems to do nothing in fmincon and patternsearch

Hello, I am using both fmincon and patternsearch algorithms. Note that, with regard to fmincon, I have no analytical gradient (...

3 månader ago | 1 answer | 0

### 1

answerQuestion

Is it possible to specify the 'order' of a smoothing spline?

Hello, I need to use smoothing splines. The matlab command 'csaps' can only be used for the case of a cubic smoothing spline....

4 månader ago | 1 answer | 0

### 1

answerQuestion

Different commands to do spline interpolation, are they the same?

Hello, I have a question about (cubic) spline interpolation in MATLAB. For cubic spline interpolation I see several commands wh...

4 månader ago | 1 answer | 0

### 1

answerQuestion

More detailed output function in optimization

Hello, I think I have a simple question but found it difficult to fix it myself. In doing the optimization we can have 'our' ...

4 månader ago | 0 answers | 0

### 0

answersQuestion

Choosing a function handle from a group of function handles

Hello, Assume that we have saved many function handles f_1_1, f_1_2,f_1_3, ..., f_2_1,f_2_2,f_2_3, .... in a folder. Now, assum...

4 månader ago | 1 answer | 0

### 1

answerQuestion

Matlab function with initial long execution time

Hello, When I run a function handle its execution time is initially very long but in the second, third, etc runs its execution ...

4 månader ago | 1 answer | 0

### 1

answerQuestion

Conversion from symbolic to matlabFunction and writing the result to a file

Hello friends, I have a simple problem but it seems difficult for me to fix. I want to create a matlabFunction from a symboli...

4 månader ago | 1 answer | 0

### 1

answerQuestion

Techniques of common subexpression elimination, disorganization in MATLAB, etc..

Hello friends, Yesterday I posed a question about performance gain in matlab by using techniques of common subexpression elimin...

4 månader ago | 0 answers | 0

### 0

answersQuestion

My mex file is slower than my original matlab equivalent

Hello friends, I need to calculate some quantities of linear algeibra type, so they are merely matrix and vector products. The ...

5 månader ago | 1 answer | 0

### 1

answerQuestion

If matlab coder fails can we still do it ourselves?

Hello friends, I have a simple question. As you know matlab coder cannot create mex functions always, for instance when the inp...

5 månader ago | 1 answer | 0

### 1

answerQuestion

Making a mex function for a rather complex code

Hello friends, I have a code which is very time consumming. Therefore, I thought to use mex function to do the heavy part of ca...

5 månader ago | 0 answers | 0

### 0

answersQuestion

Defining complex input types to make a complex mex function

Hello friends, Recently I became familliar with mex function. I am quite new to this and have lots of hopes to speed up my slow...

5 månader ago | 0 answers | 0

### 0

answersQuestion

Finding the index of elements of a vector in a mesh quite fast

Hello friends, I would like to find the index of vector of numbers A being closest in a mesh. I know how to do this but I hope ...

6 månader ago | 1 answer | 0

### 1

answerQuestion

Difference between spline(x,y,xq) and interp1(x,y,xq,'spline')

Hello friends, I have a simple question. I am wondering what is the difference between the commands spline(x,y,xq) and interp...

6 månader ago | 2 answers | 0

### 2

answersQuestion

Indefinite integral for a step function with variable number of steps

Hello friends, I have a function handle which is defined by interp1. Is there a way to find its indefinite integral? For inst...

6 månader ago | 1 answer | 0

### 1

answerQuestion

Step function with variable number of steps

Hello friends, I have a simple question but would like to find an efficient way to implement it for my very heavy codes. Assume...

6 månader ago | 1 answer | 0