# Lama Hamadeh

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**Content Feed**

Question

The slicing is not complete!

Hi all, I have the following 2D matrix and I want to slice it by taking just the elements on the first column that equal to one...

5 mois ago | 1 answer | 0

### 1

answerQuestion

extract a slice from a 2D matrix with specific values

Hi, I want to extract a slice of a 2D matrix from a bigger 2D matrix with certain values. So, if I have a matrix as follwoing: ...

5 mois ago | 1 answer | 0

### 1

answerQuestion

Choosing elements from a 2D array

Hi all, I have a 2D array int that has fixed avues of on its second column but different values on its first column. How can I...

5 mois ago | 1 answer | 0

### 1

answerQuestion

if statement is not working

Hi all, I have the follwoing code that runs fine but no output of the if statement for some reason: theta = [-90.0000 -63.4746...

5 mois ago | 2 answers | 0

### 2

answersQuestion

subtract each element from the one before in a row matrix

Hi all, I have a row matrix defined as: s = linspace(0,4,17); I want to create a vector that its elements are the half subtra...

10 mois ago | 1 answer | 0

### 1

answerQuestion

How to construct a "ones" matrix with zero blocks in the diagonal

Hi all, I am trying to construct the follwoing matrix and any help would be highly appreciated. Thank you.

10 mois ago | 2 answers | 0

### 2

answersQuestion

How to map subdivisions in a squared geometry

I have a geometry of a square with 4 edges. Each edge has 5 points and 4 cells (subdivisons). The image bellow illustrates it. ...

10 mois ago | 2 answers | 0

### 2

answersQuestion

Accessing a cell in a 2D grid

Hi all, I have a 2D grid as shown below where each cell represents a pair of and where and . I would like to construct a new...

11 mois ago | 1 answer | 0

### 1

answerQuestion

How to choose the middle of a random cell in a 2D grid

Hi all, I have a 2D grid that has 25 points equally spaced in both axes dividing the grid into little boxes/cells/pixels. Is th...

11 mois ago | 2 answers | 0

### 2

answersQuestion

Create an equally spaced vector when taking the sine of another vector

I want to create a vector containing 25 points such that the points are equally spaced when you take the sine of another vector ...

11 mois ago | 1 answer | 0

### 1

answerQuestion

Angle between two lines

I have the following geometry: All the blues and whites are known. The reds are to be determined (specifically speaking ). A...

12 mois ago | 1 answer | 0

### 1

answerQuestion

angle between two lines

I have the follwoing geometry: All the blues and whites are knowns. The reds are unknown and need to be determined (specifica...

12 mois ago | 1 answer | 0

### 1

answerQuestion

How to get the standard line equation from a position and angle

Hi all, I want to compute the standard line equation of the form in a 2D meshgrig within the positive domain given the starti...

12 mois ago | 0 answers | 0

### 0

answersQuestion

Vertical and horizontal line standard equations

Hi all, I am trying to use the standard equations of the form for both: horizontal and vertical lines and draw them on a mesh ...

12 mois ago | 1 answer | 0

### 1

answerQuestion

Angle between two vectors is computed weirdly!

Hi all, I am trying to compute the angle between line L1v and the verticle norm Nv via the dot product using the follwoing code...

environ un an ago | 1 answer | 0

### 1

answerQuestion

nan in if statement

Hi all, How can I say: if (a==0 or a==NaN) %whatever end Thanks.

environ un an ago | 2 answers | 0

### 2

answersQuestion

advance a vector coordinates in a loop

Hi all, I'd like to advance an intial vector forward in something similar to this: where the blue arrow is the initial one, ...

environ un an ago | 1 answer | 0

### 1

answerQuestion

How to draw a vector/line in a mesh

Hi all, I have the follwoing mesh: %Defining space variables L = 4; %boundary legth ns = 25; %number of points on S axis n...

environ un an ago | 1 answer | 0

### 1

answerQuestion

A matrix/grid from two vectors

Dear all, I am trying to construct a matrix (or a grid) with specific limits on the x and y axes from two vectors: ns = 20; %n...

environ un an ago | 1 answer | 0