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Elena Casiraghi


Last seen: 13 dagen ago

Università degli Studi di Milano

27 total contributions since 2018

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Question


Distance funtion of knn classifier
Dear,none I used Bayesian Optimization to choose the best parameters for a knn classifier. After optimizing I got a knn with J...

4 maanden ago | 0 answers | 0

0

answers

Question


10-fold cross validation with cross val or without
Dear, I'm trying to perform 10-fold HOLDOUT cross validation to train a knn classifier. For each HOLDOUT I also want to use an ...

4 maanden ago | 0 answers | 0

0

answers

Question


How can I view the surrogate baranches
Dear, I'm training a decision tree for classification with fitctree function and I'm using the oprion 'Surrogate', 1 mdl = fi...

5 maanden ago | 0 answers | 0

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answers

Question


plotPartialDependence cannot be recognize
Dear, when I try to use the function plotPartialDependence to see the dependance from 1 variable and the result of a bagge t...

6 maanden ago | 1 answer | 0

1

answer

Question


Simulating the decision of a bagged tree
Dear, could anyone tell me how an object of a treeBagger takes a decision? Precisely, if I have this code: dataMat = randi(...

6 maanden ago | 1 answer | 0

1

answer

Question


View the tree ensemble trained by fitcensemble
Dear, let's suppose I'm training a bagged tree ensemble on the 40 sampe points (29 features per sample) The GT labels are in th...

6 maanden ago | 1 answer | 0

1

answer

Question


Opening .SAV files (SPSS files)
Dear, I have a ".sav" file, which is a data file created with SPSS. Is there a way to open it from MATLAB R2019b? Thanks a ...

8 maanden ago | 0 answers | 3

0

answers

Question


Data Tip addition not working
Dear, I'm trying to change the data tip of my plot and I get an error I relly can't understand The code takes data from file: F...

9 maanden ago | 1 answer | 0

1

answer

Question


Boxplot in a specified position in a subplot
Dear I have a subplot which (is quite complicate). Precisely, it takes values from a table and results in plotting subplots whe...

10 maanden ago | 1 answer | 0

1

answer

Question


bar chart with wrong legend referring
Dear, I have a problem with bar charts: I hve this data: datasets = {'Dataset1', 'Dataset2','Dataset3' }; methods = {'A', '...

10 maanden ago | 1 answer | 0

1

answer

Answered
Hyper-parameter optimization
ECOC classifiers provide better results (at least in my first experiments). Anyhow I solved the problem. I defined a function ...

11 maanden ago | 0

| accepted

Question


Hyper-parameter optimization
1) When training an ECOC classifier for multiclass classification, with knn as base learner, how can I change the minimized func...

11 maanden ago | 1 answer | 0

1

answer

Question


Hyperparameter optimization for ECOC: how can I choose the variables to be minimized?
1) When training an ECOC classifier for multiclass classification, with knn as base learner, I would like to optimize only the N...

11 maanden ago | 0 answers | 0

0

answers

Question


Hyperparameter Optimization in ECOC classifier: which loss function is used?
Dear, I'm training an ECOC classifier using knn as the base classifier. I would like to use the option 'OptimizeHyperparameters...

11 maanden ago | 1 answer | 0

1

answer

Question


Cost in fitcecoc input
Dear, I'm trying to train an ecoc model using svm as base classifiers. Since the data in X is unbalanced, I would like to use ...

12 maanden ago | 1 answer | 1

1

answer

Question


str2num strange behaviour
Dear, I have this code: svmKernel ={'rbf','gaussian', 'linear','2','3','4'}; for k=1:numel(svmKernel) [p, status] = str2n...

12 maanden ago | 1 answer | 0

1

answer

Question


Custom Classification Loss: which is the role of S?
Dear, I have a classification problems with labels 1,..,5. Since the label is a score related to a grade, I would to compute t...

12 maanden ago | 1 answer | 0

1

answer

Question


How to train fitcecoc by using COST SENSITIVE SVM
Dear, I have a multiclass problem with an highly unbalanced dataset. How can I train a multiclass, error-correcting output code...

12 maanden ago | 1 answer | 1

1

answer

Question


Doubts about cross-validation
I'm trying to test performance of a KNN and a svm (cecoc) classifier for a multiclass problem. For the knn model I do it by bui...

12 maanden ago | 1 answer | 0

1

answer

Question


How can I set the colors in the legend if I show a number of legend elements which is lower thatn the number of plotted functions?
Dear, I'm trying to do a bar chart as the attached one (and shown below). As you can see, the bar chart contains, for six diffe...

12 maanden ago | 2 answers | 0

2

answers

Answered
I need to write a GUI that shows an image and allows to draw on it by selecting different colors
Here you get the code. The code starts with CorrectMarkersLater, which calls correctMarkersNow, which calls pointsInPoly. The...

ongeveer een jaar ago | 0

Answered
I need to write a GUI that shows an image and allows to draw on it by selecting different colors
I found that indeed imfreehand let's me chose the color, however, if I zoom in it goes off :\

ongeveer een jaar ago | 0

Answered
I need to write a GUI that shows an image and allows to draw on it by selecting different colors
Thanks, I'll try to proceed based on that. But I can't change the color of the drawing right? Can I let the user draw more than...

ongeveer een jaar ago | 0

Question


I need to write a GUI that shows an image and allows to draw on it by selecting different colors
I was looking at the 45 sample GUIs I need something similar to that shown in GUI 39. The only difference is that the drawing ...

ongeveer een jaar ago | 4 answers | 0

4

answers

Question


IMREAD Error opening TIF files
Dear, while rading a TIF file, I get this error TIFF library error - 'TIFFFetchNormalTag: Incorrect count forr "ImageDepth".' W...

meer dan een jaar ago | 1 answer | 0

1

answer

Question


BioFormat for matlab and svs images
Dear all does anyone know how can i open an svs image by using bioformat? My images have 4 planes: * image at the maxim...

bijna 2 jaar ago | 0 answers | 0

0

answers

Question


How can I show a big image to the user, and let him zoom on it to click on specified points?
Hello I'm showing images (with a huge size) to the user, and he must selct pixels from it. However, selection must be precise ...

bijna 2 jaar ago | 1 answer | 0

1

answer