Community Profile # Amine Ben Ayara

### University of Tennessee Knoxville

Active since 2015

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Changing Matrix dimensions from 4D to 2D: Matrix Manipulation, while preserving order of the data.
<</matlabcentral/answers/uploaded_files/98861/Screenshot%202017-12-17%2011.45.53.png>> Hello everyone, I would like some fe...

bijna 5 jaar ago | 2 answers | 0

### 2

Question

How to extract multiple matrices from a big set (Large Matrix) of data?
Hello Matlab, I need some help extracting some matrices from a bigger data set. My large 4D-matrix/ dataset has the followin...

bijna 5 jaar ago | 1 answer | 0

### 1

Question

matrix manipulation and changing matrix dimension using Reshape, Squeeze,..
Good morning Matlab community, I will try to make the question simpler since it was not clear for someone to understand, sor...

meer dan 5 jaar ago | 0 answers | 0

### 0

Question

Matrix manipulation and matrix dimensions
Hello Matlab community again, I am still trying to figure out few steps with getting from one dimension to another in matlab...

meer dan 5 jaar ago | 2 answers | 0

### 2

Question

How to normalize negative values in a data set/ Matrix
Hello Matlab community, I have a large matrix (14680*751), each row contains data that need to be plotted(i.e., supply curve w...

bijna 6 jaar ago | 2 answers | 0

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Question

Element extraction from Matrix based on column index from another matrix.
Good afternoon/good day Matlab community, I would like some help with an exercise that I am trying to complete giving two inpu...

bijna 6 jaar ago | 1 answer | 0

### 1

Question

How to get an equation of a line/curve from a data set(Matrix) with two variables?
Good morning Matlab community, I have a matrix A(171000,2) and I plotted the data as shown in the attached figure. I do need t...

bijna 6 jaar ago | 2 answers | 0

### 2

Question

matrix manipulation and arrays manipulation
Dear Matlab community, I apologize in advance if I may have asked too many questions as suggested by some users on here. I usu...

bijna 6 jaar ago | 0 answers | 0

### 0

Question

Change matrix dimensions from 4D to 2 D : matrix manipulation
Dear Matlab community, I am still trying to manipulate some of my output here by converting 4D matrices to 2D. I am having a har...

bijna 6 jaar ago | 2 answers | 0

### 2

Question

Matrix Manipulation from 4D to 2D
Hello Matlab Community again, Back with another question. So I have this matrix that is 4D (5 by 5 by 14680 by 30); in my ow...

bijna 6 jaar ago | 1 answer | 0

### 1

Question

Matrix Manipulation from 4D to 3D
Good morning Matlab Community, I hope all of you are doing well. I need some help with manipulating matrix dimensions. I h...

bijna 6 jaar ago | 1 answer | 0

### 1

Question

Aggregate Data in a large matrix using unique identifiers.
Hello Matlab world, I hope everyone is doing really well. I have a large matrix and I need to aggregate the data in based on u...

bijna 6 jaar ago | 1 answer | 0

### 1

Question

reshape 4D matrix into 2D matrix
Good morning Matlab, I have a 4D-Double matrix that has this dimension: (5*5*5*30) and I need to convert it into a 2D matrix, ...

bijna 6 jaar ago | 2 answers | 0

### 2

Question

Extracting Matrix/Matrices from a 4D Matrix
Hello Matlab Wizards, Hope everyone is doing well. I need some directions with the most efficient one to extract a matrix or num...

bijna 6 jaar ago | 1 answer | 0

### 1

Question

How Store a set of Matrices independently after each iteration is done in a for loop.
Hello Matlab again, I am going to ask my question more accurately this time. I am trying to modify an existing code to where I...

bijna 6 jaar ago | 1 answer | 0

### 1

Question

For Loop and final output matrix
Hello Matlab Wizards, I hope everyone is doing wonderful. I have written a code that has an outside loop that consists of basi...

bijna 6 jaar ago | 2 answers | 0

### 2

Question

Function or code in Matlab that can determine the linear equation given input data on two variables
Hello Matlab wizards, I am having a bit of challenge running an optimization problem here. I was wondering if there is a way; ...

bijna 6 jaar ago | 1 answer | 0

### 1

Question

Matlab Optimization problem, minimize a function
Hello, So I have a simple optimization problem that consists of finding a value for a variable that minimizes the difference bet...

ongeveer 6 jaar ago | 1 answer | 0

### 1

Question

How to run an Optimization function in Matlab? Minimize function
Hello, So I have a simple optimization problem that consist of finding a value for a variable that minimizes the difference be...

ongeveer 6 jaar ago | 1 answer | 0

### 1

Question

How to do a Matrix Aggregation.
I have 19720 of (7by7) matrices stacked up in excel file ( so basically a total of 138040 row). I want to aggregate these matric...

meer dan 6 jaar ago | 1 answer | 0

### 1

Question

Change a 3D matrix to a stacked 2D matrix
I have a matrix of (5*5*14680) dimensions, basically 14680 of five by five matrices, I need to convert this output to a 2D mat...

meer dan 6 jaar ago | 2 answers | 1

### 2

Question

Change the dimension of an output matrix
I have an output matrix of (5*5*44040) dimension. I would like to convert it into 1 dimension so basically all the (5*5) are sta...

meer dan 6 jaar ago | 2 answers | 0

### 2

Question

aggregation by grouping unique values
I have a matrix (14252*2) dimensions. Column one elements represents numerical value-identifiers that may be duplicated and appe...

meer dan 6 jaar ago | 1 answer | 0

### 1

Question

sorting and selecting data within a matrix to match two columns.
I have two matrices in which there are tow columns with unique identifiers. The 1st matrix is much bigger (207000*4) dimension...

meer dan 6 jaar ago | 1 answer | 0

### 1

Question

Help with verifying a while loop
I have been trying to get a while loop to run all the way through but I keep getting an error; "Error using horzcat Dimensions ...

meer dan 6 jaar ago | 1 answer | 0

### 1

Question

How to verify a while loop and run it correctly?
Hello, I have written a code using a while loop. which basically uses 3 input matrices, two of which are identical in dimensio...

meer dan 6 jaar ago | 1 answer | 0

### 1

Question

How Do I find unique values of an element in a matrix
I have a matrix that is (110500*4); the First column are identiers/IDs, these values are not unique, meaning same value can appe...

meer dan 6 jaar ago | 2 answers | 0

### 2

Question

While loop not working properly
I have written this while loop and my final output should be a matrix of at least 14680 rows ( by the minimum), by 3 columns. Ho...

meer dan 6 jaar ago | 1 answer | 0

### 1

Question

My final output matrix contains NaN values
I have written a code where there are 100 iterations, and at the end I get a matrix (14680*101). for some strange reason, some e...

meer dan 6 jaar ago | 1 answer | 0