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# Royi Avital

### Ben Gurion University

112 total contributions since 2011

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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 ...

1 month ago | 0

| accepted

Submitted

1D Convolution by Overlap and Save - Optimized
Highly optimized implementation of the Overlap and Save method for Linear 1D Convolution. The function optimizes the optimal DFT...

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...

1 month ago | 1

Submitted

GLPKMEX - GNU Linear Programming Kit (GLPK) MEX Generator
This MATLAB package generates a stand alone MEX file for the GNU Linear Programming Kit (GLPK). The MEX can solve Linear Program...

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...

2 months 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 ...

2 months ago | 3 answers | 1

### 3

Matlab 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 months ago | 0

Question

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...

5 months ago | 3 answers | 1

### 3

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. ...

8 months ago | 0 answers | 0

### 0

Question

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...

9 months ago | 1 answer | 0

### 1

Question

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?...

1 year ago | 5 answers | 2

### 5

Can 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...

1 year ago | 1

SuiteSparse Installation: Cannot open include file: 'regex.h'
Why would you need SuiteSparse in MATLAB? I though MATLAB uses SuiteSparse to begin with.

1 year 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...

1 year ago | 0 answers | 0

### 0

Creating 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...

1 year ago | 1

Solved

Generate Convolution Matrix of 2D Kernel with Different Convolution Shapes (Full, Same, Valid)
In this problem the challenge is to build the Matrix Form equivalent of the function conv2() of MATLAB. The function to be ...

1 year ago

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...

1 year ago | 4 answers | 1

### 4

Problem

Generate Convolution Matrix of 2D Kernel with Different Convolution Shapes (Full, Same, Valid)
In this problem the challenge is to build the Matrix Form equivalent of the function conv2() of MATLAB. The function to be ...

1 year ago | 0

How can I determine whether a string contains a substring?
I guess that since MATLAB R2016b it is recommended to use <https://www.mathworks.com/help/matlab/ref/contains.html contains> :...

2 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.

2 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)....

2 years ago | 1

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...

2 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/...

3 years ago | 2 answers | 0

### 2

What 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 ...

3 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...

3 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 ...

3 years ago | 0

Question

Saving Figure Data into a Matrix
Hello. I'm using 'image()' to display an image. I'm adding some annotations using text. I'd like to save the final resu...

3 years ago | 2 answers | 0

### 2

Solved

Summing digits
Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

3 years ago

Solved

Bullseye Matrix
Given n (always odd), return output a that has concentric rings of the numbers 1 through (n+1)/2 around the center point. Exampl...

3 years ago

Solved

Return the largest number that is adjacent to a zero
This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...

3 years ago