# Royi Avital

### Ben Gurion University

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How do I remove the border lines surrounding an axes?

In newer MATLAB versions this can be done using the XAxis and YAxis sub objectes: hF = figure(); hA = axes(hF); set(hA, '...

8 months ago | 1

Question

List of New / Updated Functions per MATLAB Version

Is there a way to generate a list of new (Or updated) functions in MATLAB per release? I know I can see in documentation per fu...

2 years ago | 2 answers | 0

### 2

answersAssign a Sub Array to Array Knowing the Number of Dimensions at Run Time

OK, It turns out it can be done using Cell Arrays: vSizeB = size(tB); numDims = length(vSizeB); %<! Equals to ndims(tB) cId...

2 years ago | 0

| accepted

Question

Assign a Sub Array to Array Knowing the Number of Dimensions at Run Time

Assume we have tA and tB with the same number of dimesions. We also have all(size(tB) <= size(tA)) == true. The task is to emb...

2 years ago | 2 answers | 0

### 2

answersQuestion

Convert a LayerGraph into a DAGNetwork - Validate and Initialize the Net

In theory, the function assembleNetwork() should convert a LayerGraph into a DAGNetwork. Yet in practice, it doesn't always wor...

3 years ago | 1 answer | 0

### 1

answerUpload image and get direct link on imgur

Since IMGUR uses REST based API you can do it in MATLAB. Best way to start is trying to replicate the Python library: IMGUR P...

3 years ago | 0

How do I initialize a complex array to zeros in MATLAB?

In later versions one could do something like vB = zeros(3, 1, 'like', 1j);.

3 years ago | 3

How can I set a custom path in Matlab R2017a on MacOS?

You should use setenv() to set the path. Pay attention that usually you want to add something to the path and not override it. ...

4 years ago | 1

| accepted

Is there a way to Call Jupyter from Matlab?

I am not sure what do you mean by calling Jupyter from MATLAB. If you mean using MATLAB in Jupyter, it is certainly doable and ...

4 years ago | 0

| accepted

how to implement MILP in matlab

I also created a MEX wrapper around GNU Linear Programming Kit (GLPK). You may find it at https://www.mathworks.com/matlabcentr...

4 years ago | 1

Most Efficient Way to Construct the Matrices to Extract the Lower and Upper Triangle from a Vectorized Matrix

My current solution: function [ mLU ] = GenerateTriangleExtractorMatrix( numRows, triangleFlag, diagFlag ) EXTRACT_LOWER_TRI...

4 years ago | 0

Question

Most Efficient Way to Construct the Matrices to Extract the Lower and Upper Triangle from a Vectorized Matrix

Given a matrix and its vector form I am after the most efficient way to build the matrices and which extracts the lower and ...

4 years ago | 3 answers | 1

### 3

answersQuestion

Generating Toeplitz Matrix which Matches the Convolution Shape Same

Given a filter vH I'm looking for vectors vR and vC such that: toeplitz(vC, vR) * vX = conv(vX, vH, 'same'); For instance, for...

4 years ago | 3 answers | 1

### 3

answersMatlab equivalent to iPython Notebook

As written above, there is the option of MATLAB's Live Editor. I find it to be really limited vs. iPython Notebook. They are no...

5 years ago | 1

Question

Faster and More Efficient `squareform()`

I'm using squareform(pdist(mX)) fairly often. The problem is squareform() is so slow it makes use of pdist2(mX, mX) faster. ...

5 years ago | 0 answers | 0

### 0

answersQuestion

How to Imply the Input Array Dimensions to MATLAB Coder

Assuming I have a simple function in MATLAB: function [ mG ] = ProcessImage( mI ) %#codegen mG = edge(mI, 'Sobel', [], 'bo...

5 years ago | 1 answer | 0

### 1

answerQuestion

MATLAB's JIT Engine

Do you think MATLAB's JIT engine is oudated? It does look so. Look at Julia Language: http://julialang.org/ What do you think?...

5 years ago | 5 answers | 2

### 5

answersCan I use Microsoft Visual Studio 2019 with MATLAB R2019a or R2018b?

I'm not sure how the search for Compiler works for the mex command. From 5 minutes research I did I came to the conclusion it w...

5 years ago | 2

SuiteSparse Installation: Cannot open include file: 'regex.h'

Why would you need SuiteSparse in MATLAB? I though MATLAB uses SuiteSparse to begin with.

5 years ago | 0

Question

Improving Speed and Reducing Memory Consumption with Creation of 2D Sparse Convolution Matrix

In a previous question of mine, Creating Convolution Matrix of 2D Kernel for Different Shapes of Convolution, among answers of t...

5 years ago | 0 answers | 0

### 0

answersCreating Convolution Matrix of 2D Kernel for Different Shapes of Convolution

Here is my solution which build Doubly Block Toeplitz Matrix: function [ mK ] = Create2DKernelConvMtxSparse( mH, numRows, numCo...

5 years ago | 1

Question

Creating Convolution Matrix of 2D Kernel for Different Shapes of Convolution

MATLAB, for thos who have access to Image Processing Toolbox offers the function convmtx2(). Yet there are 2 issues: It is onl...

5 years ago | 4 answers | 1

### 4

answersHow can I determine whether a string contains a substring?

I guess that since MATLAB R2016b it is recommended to use `contains` : Determine if pattern is in strings - MATLAB contains - M...

6 years ago | 1

Functional form of the colon (:) operator?

I really wish MATLAB would add function to vectorize arrays into column vector as the colon operator does.

7 years ago | 0

Change opacity of Lines

In newer versions of MATLAB you can do that easily using the Color property of the line. By default it is RGB array (1 x 3)....

7 years ago | 7

GUI - Slider which has two slide bars

Maybe you meant a Range Slider which you can create as shown in <http://undocumentedmatlab.com/blog/sliders-in-matlab-gui Slider...

7 years ago | 0

Question

Display Pixel Values in Image - Alternative to `showPixelValues()`

Hello, I would like to display an image and its pixel values in a similar manner to <https://www.mathworks.com/matlabcentral/...

7 years ago | 3 answers | 0

### 3

answersWhat is missing from MATLAB?

What I miss the most is better forum for the community. We need Math Equation support through MathJaX (Like in StackExchange ...

7 years ago | 0

How to perform KNN regression

At each point you want to calculate the value (x, y) find the K closest point (For x). Then average them to create the new va...

7 years ago | 0

Averaging Overlapping Pixels in Sliding Window Operation

Another option would be: I = reshape(accumarray(mIdx(:), mZ(:), [(M * N), 1], @(x) mean(x)), [M, N]); Where `mZ` is the ...

7 years ago | 0