# João Mendes

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**Content Feed**

Question

Deep Network Designer with dicom images

Hi, I am trying to use the Deep Network Designer app. However, when I try to load the dataset - that I arranged as suggested - ...

4 månader ago | 1 answer | 0

### 1

answerQuestion

Using fitcdiscr without feature normality

Hi! I was making a classification task (training a classifier) using fitcdiscr. Is it still possible to use it if my features (...

ungefär ett år ago | 0 answers | 0

### 0

answersQuestion

Bayesian Optimization Hyperparameters .

Hi to all, Can any one help me to understand how bayesian optimization works in the task of finding the best hyperparameters o...

mer än ett år ago | 1 answer | 0

### 1

answerQuestion

Image Registration (imregister)

Hi, I am currently using the imregister function in MATLAB. I would like to know a little bit more about image registration,...

mer än ett år ago | 0 answers | 0

### 0

answersQuestion

Proble with imnoise function

Hi to all, Does anyone some the "formula" that is used to add gaussian white noise to the image? Thanks in advance, J

mer än ett år ago | 1 answer | 0

### 1

answerQuestion

SVM: fitcsvm generalization rate problem

In fitcsvm help page, this is shown: What do they mean by "generalization rate" ? Thanks, J

mer än ett år ago | 0 answers | 0

### 0

answersKNN clasiffier and KNN clasification

Try this. Check the examples: https://www.mathworks.com/help/stats/fitcknn.html Tell me if it helps, J

mer än ett år ago | 0

Question

fitcsvm cross-validation

Hi, I am training a SVM classifier with the following code: SVM_1=fitcsvm(X_train, y_train, 'OptimizeHyperparameters', 'all','...

mer än ett år ago | 1 answer | 0

### 1

answerQuestion

Having graycomatrix rescaling problem

Hi to all, I am having some trouble using the graycomatrix function. I tried to read the documentation but that did not answere...

mer än ett år ago | 1 answer | 0

### 1

answerQuestion

Breast Density in Mammography

Hi to all, Does anyone knows of any app/code to classify mammograms in density terms? Or even an app that computes a density v...

mer än ett år ago | 0 answers | 0

### 0

answersQuestion

Add noise to an image

Hi everyone, I wanted to add noise to an image (mammogram), in a way that simulates the effect of having a lower dose. Does an...

nästan 2 år ago | 0 answers | 0

### 0

answersQuestion

Support Vector Machine - Plots

Hi to all, Can anyone please explain what do these plots mean when I'm optimizing my model when using fitcsvm? It's my first ti...

nästan 2 år ago | 0 answers | 0

### 0

answersQuestion

ClipAlphas in fitcsvm, for machine learning

Hi to all, I was exploring the fitcsvm function and got stuck with ClipAlphas parameter, it is set to true as default, but why ...

nästan 2 år ago | 0 answers | 0

### 0

answershow to count the number of a specific value in a cell array and how to access the index of each value

To know the positions of the active checkboxes you can write: active= find([a{:}]==1) To know how many are active, i.e., how ...

ungefär 2 år ago | 0

Question

Computing Correlation in graycoprops

Hi everyone, I was trying to check my calculations with the results provided by graycoprops, however, they don't match. I don...

ungefär 2 år ago | 0 answers | 0

### 0

answersQuestion

Get gray level run length matrix

Hi, How can I extract the run length matrix - only that, no features attached - from a given image (matrix) ? Is there any fu...

ungefär 2 år ago | 0 answers | 0

### 0

answersQuestion

Retrain model, Classification Learner

Dear all, How can I retrain a model that I created with MATLAB app Classification Learner? Thanks, J

nästan 3 år ago | 1 answer | 0

### 1

answerQuestion

Segment 2D image into 3 equal parts

I'm currently trying to draw 2 vertical lines at each lung, to divide them into three almost equal parts but I'm having some tro...

mer än 3 år ago | 0 answers | 0

### 0

answersQuestion

Control image transparency with a slider- appDesigner

Hi all, I'm trying to control de tranparency of two images using a slider. Currently, I don't know how to do the code for t...

mer än 3 år ago | 1 answer | 0

### 1

answerQuestion

.nii to .mat

Hey guys, I was wondering if you could help me out. I'm having some problems opening medical images in MATLAB. Their extens...

mer än 3 år ago | 2 answers | 0