# ali eskandari

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how apply k-means on a n by m matrix based on rows

I want to apply a kmeans clustering with cosine distance on a n by m matrix and I want to define each row as a sample. how can I...

6 days ago | 1 answer | 0

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answerQuestion

how to scan a matrix row by row and save index of elements

A = 1 2 3 4 0.5 5 6 2 5 3 1 3 I have a matrix-like A, and my aim is to scan the...

25 days ago | 1 answer | 0

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count matrix elements in defined intervals by histogram

In the attached matrix, I want to extract the ratios of matrix elements at defined intervals. In order to do that, I have writte...

2 months ago | 1 answer | 0

### 1

answerQuestion

extract the intersection of two matrices

Hi I have two matrices, one is binary (A) and other one with values between [0-1] (B). My aim is to extract the intersection of...

2 months ago | 1 answer | 0

### 1

answerQuestion

Extract pixel values inside a Binary Mask

I have an image and the ROI points. I did the following to extract the ROI by creating a binary mask with poly2mask. now I want ...

4 months ago | 1 answer | 0

### 1

answerQuestion

Access to matrix elements

I have two matrices, A and B. I want to extract values of matrix A based on indexes of B. Consider B like a pixel position in a...

4 months ago | 1 answer | 0

### 1

answerQuestion

Shanon entropy of a matrix

I defined a matrix like A and I want to calculate its entropy and when I use the entropy function it returns zero : A = [2,3,4...

6 months ago | 1 answer | 0

### 1

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how to define a gradient colormap

I have different matrices with elements between zero and one, then I want to subtract some of them from each other and plot the ...

7 months ago | 2 answers | 0

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answersQuestion

Create a mask for different values

I want to subtract two images and show the results in another figure. For instance, if the subtraction matrix has 0 value indica...

7 months ago | 1 answer | 0

### 1

answerQuestion

how to avoid for loops or faster way for compute 3x3 avarage value of an image

I have a few pixels in an image and I want to calculate the average values of a 3x3 window centred on those pixels in Matlab. ...

11 months ago | 1 answer | 0