# Dario Walter

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Question

Round Datetime to certain minutes

Hey, I am trying to round an array of datatype datetime to nearest 20 and 50 minutes, e.g. 16:30 - 16:20, 16:54 - 16:50, 16:01 ...

3 years ago | 1 answer | 0

### 1

answersize of sequence input layer of LSTM

Because the inputSize is equal to the number of used features (6 in your case). See documentation https://de.mathworks.com/help/...

3 years ago | 0

Question

Explanation predictorImportance - Ensemble Learning with Decision Trees

Hey, I try to understand what the function predictorImportance is doing when using Ensemble Learning with Decision Trees. The M...

4 years ago | 1 answer | 0

### 1

answerHow do I obtain scores as probabilistic estimates using the predict function on a fitcensemble model?

So the 'ScoreTransform','logit' works for AdaboostM1 to receive probability estimates. Bagging does not require any transformati...

4 years ago | 3

Question

Adaboost Learning Rate in Matlab Documentation

Hey, the description of Adaboost allows to set a learn rate. https://de.mathworks.com/help/stats/fitcensemble.html However, ...

4 years ago | 1 answer | 0

### 1

answerQuestion

Classification Score "fitcensemble" with Decision Trees - Ambiguous Matlab Documentation

Hey, I try to figure out how the classification score is calculated when using cecision trees with the fitcensemble function. I...

4 years ago | 1 answer | 0

### 1

answerQuestion

Create k-fold Cross Validation with Undersampling for highly imbalanced Dataset

Dear Community, I am not sure how to implement the following requirement. When I use undersampling for my supervised Machine Le...

4 years ago | 1 answer | 0

### 1

answerQuestion

How are NaN Values handled by Matlab Decision Tree / Ensemble Learner

Hey, I could not find a satisfying answer with respect to the topic provided in the title. Does Matlab exclude entire observati...

4 years ago | 1 answer | 0

### 1

answerHow to upgrade MATLAB R2020a

Unfortunately, you have to reinstall all toolboxes. Using "ver" command, you can look at all installed toolboxes

4 years ago | 0

Question

Heatmap of One Variable

Hey folks, I hope you can help me with the issue attached to this question. I would like to create a heatmap that looks like th...

4 years ago | 1 answer | 0

### 1

answerQuestion

Increase counter for each element in array

Hey, given A = [1 1 3 4 5 6 6 7 7 7]. How could I return the sequence B =[1 2 1 1 1 1 2 1 2 3] such that each duplicate is coun...

4 years ago | 1 answer | 0

### 1

answerQuestion

Use perfcurve to update model threshold?!

Dear Community, I am wondering how to use the datapoint of OPTROCPT (see example https://www.mathworks.com/help/stats/perfcurve...

4 years ago | 0 answers | 1

### 0

answersROC curve - how automatically find the most suitable threshold?

There is an output available in the perfcurve functions that returns the value you are looking for: [X,Y,T,~,OPTROCPT,suby,su...

4 years ago | 0

Weighted Classification Layer for Time Series/LSTM

Dear Conor, would you mind to explain how it works for a Sequence-to-label classification? I have imbalanced sequence data (9...

4 years ago | 0

Question

Find Command after certain Value

Dear Community Members, I am looking for a function to return the rowindex of the following problem: Assuming a matrix A, I nee...

4 years ago | 1 answer | 0

### 1

answerQuestion

Run same function for different objects from same class

Hey guys, I am still a beginner in OOP. Hope, that the question is not too stupid ;). Let's assume geMode1,geMode2,geMode3,ge...

4 years ago | 2 answers | 0

### 2

answersVarargout - How to realize function call

Thanks yor your help folks! I thought that a more sophisticated way exists than setting out = [ ]. Anyway, I am happy with that ...

4 years ago | 0

Question

Varargout - How to realize function call

Hey guys, let us assume the following function: function [out1,out2,out3]=test(j,k) out1= nargin; out2 = j-k; if out2 == ...

4 years ago | 3 answers | 0

### 3

answersQuestion

Heatmap Chart - Depict Squares rather than Rectangles

Hey guys, I have a heatmap object h and would like to depict squares rather than rectangles (see appendix). The heatmap prope...

4 years ago | 1 answer | 0

### 1

answerQuestion

Calculate minimum distance between point and steady but NON differentiable function

Hey, I could not find any mathematical explanation regarding this topic on the internet and hope for your help. Is there a way...

5 years ago | 1 answer | 0

### 1

answerQuestion

Function - return array instead of single value

Hey, I have the following problem: The function stated below has an input of "lat_deg" and "long_deg" arrays. However, the ou...

5 years ago | 0 answers | 0

### 0

answersQuestion

Leave out dot notation in table variables

Hey guys, I am using quite a lot of functions that require the variables from a table "D". Because of that, every function has ...

5 years ago | 2 answers | 0

### 2

answersQuestion

Concatenate Tables with/without "Join"

Hey guys, I could really need your help right now! Let us assume A = table(['A';'B';'C';'D';'E'],[38;43;38;40;49],... 'V...

5 years ago | 1 answer | 0

### 1

answerQuestion

Moving Mean Function - How to apply

Hey guys, I want to create a moving average with window size 4 as depicted below (take last 4 entries and in the beginning the ...

5 years ago | 1 answer | 0