Community Profile # Orr Streicher

##### Last seen: 4 days ago
13 total contributions since 2021

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Question

Difference between eigs and svds
Hi, Im trying to find the 6 smallest eigenvalues and thier coresponding eigevectors of a matrix L. i tried the 2 following com...

13 days ago | 2 answers | 0

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answers

Question

Search window in KNN
Hi, I have a data marix D in size of Nxd where N is the number of samples (lets say 50,000) and d is a sample dimention (lets ...

2 months ago | 1 answer | 0

### 1

answer

Question

Graph Laplacian and adjacency matrix
Hi, Does anyone know an afficient way to compute sparse adjacency matrix and Graph Laclcian directly from a data matrix ? I sa...

2 months ago | 2 answers | 0

### 2

answers

Question

Spiral density function implementation
Hi, I need to define a Spiral density function with parameters theat (the angle of the spiral) and r (the radius) Does anyone ...

2 months ago | 1 answer | 0

### 1

answer

Question

Define a density function and draw N samples of it
Hi, So i want to define a density function and draw N samples of it. does anyone know how can i do it? for example if i want ...

2 months ago | 2 answers | 0

### 2

answers

Question

Conditional normal random distribution
Hi, I would like to create a spiral in matlab while the radius is dependent on the angle theath in the following way: thate is...

2 months ago | 1 answer | 0

### 1

answer

Question

Efficient way to do elementry operations on sparse matrix
Hi, I am working with sparse matrices and i wonder if there is an efficient way to scan the elements of this kind of matrices a...

3 months ago | 1 answer | 0

### 1

answer

Question

fftfilt function inputs and output
Hi, Does the inputs and output of the function fftfilt should be in the time or frequency domain? i coundt understaned it bas...

4 months ago | 2 answers | 0

### 2

answers

Question

pos argument in steervec function
Hi, I would like to create a steering vector using steervec function. As far as i understand from the documentation the argume...

5 months ago | 1 answer | 0

### 1

answer

Answered
Afficient way to create "sum matrix"
Hi, So its looks like i was happy too soon =P Since my vector g is very large ( vector in size of 65536) I got memrory error...

5 months ago | 0

Question

Afficient way to create "sum matrix"
Hi, So i would like to implement a function that get a vector as input lets : g=[g1, g2, g3] and return a matrix that contain...

5 months ago | 2 answers | 0

### 2

answers

Question

Make a weight matrix sparce
Hi, I have an image in size of 256x256. I would like to implement an algorithem that use graph theory on this image so i wan...

5 months ago | 0 answers | 0

### 0

answers

Question

Efficient way to calculate distance matrix between cells
Hi, So i have an image with size of 512x512 pixels For each pixel i calculte an environment of 11x11 nighbours so now i have ...

5 months ago | 1 answer | 0

answer