Questions tagged [features]

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9 views

Latent space for cross domain numerical features

I would like to find the shared latent space between two set of features. I have source and target domain features already extracted from images. I have 4 set of feature vectors for normal and ...
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0answers
40 views

How SHAP value explains contribution of features for outliers event?

I'm trying to understand and experiment with how the SHAP value can explain behaviour for each outlier events (rows) and how it can be related to shap.force_plot(). ...
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17 views

ANOVA Feature Scoring

in order to score features, in ORANGE, using ANOVA scoring, the features should have a normal distribution? Thank you, J
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2answers
27 views

Does binning a time series with pd.qcut (using quantiles) create data leakage?

Let's say I want to predict whether a company will default on it's debt at some point in time (so binary classification) and one of the time series variables I'm using is the "revenue" of ...
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1answer
44 views

Multi-Feature One-Hot-Encoder with varying amount of feature instances

Let's assume we have data instances like this: ...
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2answers
68 views

Xgboost : A variable specific Feature importance

I have a data set something like this: ...
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1answer
16 views

combine two features into one

In a epidemic disease dataset of 3 months, I have a feature (var dt_died) with the death dates of patients (800 people died out of all 12k unique subjects in this dataset, so obviously only died ...
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1answer
35 views

Feature importance difference in two similar machine learning models

Situation 1: I have trained a text classification model (Model 1) which gives me a probability of true class as X. I have also trained a classification model (Model 2) using only the categorical and ...
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0answers
25 views

Non-Gaussian like distributions - Classifier of source data fails on target data

I ask you for help on a classification problem (classes are represented by the numbers 0,1 and 2). All features are extracted from time series data (fundamental is sinus shape). I have a source ...
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0answers
35 views

Self Organising Map with variable length ordered sets of N-grams

I want to preface my question with the highlighted situation I have might not be applicable to kohonen self organising maps (SOM) due to a lack of understanding on my part so I do apologise if that is ...
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1answer
29 views

What are data meta features?

I want to know what are the dataset meta features? When I google Meta Features what I get is feature selection tool called "Meta-Feature" but what I want is the definition of the dataset's ...
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1answer
12 views

distribution difference between image and text

Once for the task of image captioning I've read that, the features extracted from image and text by deep networks are from two different worlds and got different distribution. My question is how is ...
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1answer
25 views

Neural networks with not-fixed dimension for input and output

I would like to know if it exists a model/method which can deal with input and output of different dimension. For example, let us say that the maximum number of info we could have is 6 features and 5 ...
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0answers
19 views

Machine learning on graphs

I'm looking for some method/model to help me with my current problem: I have a geometry, consisting of points, and eges. For each point I take information about itself and its neighbours. For now I ...
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1answer
20 views

Terminology in machine learning: exogenous features vs external features

I am currently writing a scientific paper and do not know whether to call some of my input features of my neural network either external or exogenous. My neural network receives as input features like ...
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1answer
130 views

grid search result max_features = 'sqrt' in random forest - how to understand

I did a grid search at random forest params. the result of print(randomforestreg.best_params_) The result is = {'max_depth': 28, 'n_estimators': 500 ',max_features'...
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2answers
18 views

When combined correlation of features decreases

I'm building a machine learning model in Python to predict soccer player values. I'm trying to predict a "player_value" column containing the value of a specific player. Consider a sample of ...
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0answers
24 views

Feature selection by involving validation dataset

I need expert advice about a small algorithm created to perform features selection. I have used a genetic algorithm to perform features selection based on a specific objective function (good accuracy &...
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3answers
258 views

How to insert two features in a model when a feature only applies to a certain group in the model

I'm building a machine learning model in Python to predict soccer player values. Consider the following feature columns of the dataframe: ...
1
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1answer
27 views

Are my features enough?

I am trying to fit a regression model on a non linear data. The features I have are around 12 and around 800 samples. With the help of PyCaret, i tried to fit the data on to around 22 model, and then ...
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1answer
28 views

Imputing features with NA values in classification task

I currently have a dataset where each observation is a person's traffic ticket history over districts. For each column, which represents a district: 1 represents that a person has received 1+ traffic ...
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2answers
896 views

Similarity Measure between two feature vectors

I have face identification system with following details: VGG16 model for feature extraction 512 dimensional feature vector (...
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1answer
42 views

Classification or regression problem?

I have a table with this features: ...
3
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1answer
76 views

How to handle a feature vector that could be variable length?

I would like to train a machine learning model with several features as input as X[] and with one output as Y. For example Every sample has a Data frame like this: ...
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1answer
42 views

File path encoding to feature

I am trying to find some sort of encoding algorithm that would allow to transform system file paths eg. "c:/users/file1/subfile2/targetfile" into a feature that I could use in machine ...
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2answers
148 views

Mathematically prove why sparsity leads to model overfitting

With respect to the stackoverflow post here: https://stackoverflow.com/a/59566478/9130959 I can't quite get why the logic stands: when # features increases, the hypothesis space is expanded, leading ...
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1answer
22 views

How Calculate Effect (percentage) label of the input variables on the output variable by DecisionTreeClassifier

a description problem below. I have 10 words like X1 , X2 , X3 , ... , X10 and three Label like short , long , hold. My problem is that how calculate Effect (percentage) label of the input variables ...
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1answer
12 views

What should you do with attributes that predictive in an interaction?

I am trying to predict results of football games. Some of our attributes only give meaning for a prediction only when they are considered in interaction with another attribute. To illustrate, a team ...
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0answers
39 views

NN training with repetitive features

I posted the question also on ai.stackexchange but it didn't get any answers so I though I could try here. Here is a copy paste: Let's say you are training a NN in a RL setting where the state (i.e. ...
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1answer
176 views

Getting the positive impacting features using SHAP

I'm attempting to use SHAP to automatically extract feature names that have a positive impact on my regression models. On inspection of the code I see that the bar plot, for example, determines these ...
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1answer
156 views

Why linear regression feature coefficients become super large?

Introduction I've implemented linear regression using sklearn and after all calculations I've got results like this: ...
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0answers
23 views

Multivariate LSTM RNN DNN returning multiple features for forecasting a time series in Python

I am using the latest installation of Keras with Python 3.6 on Linux Mint with a NVIDIA (NVDA) 2070 GPU. I am looking up. How to get the return values of my data? How do I use all of the features, and ...
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1answer
27 views

How to select the best features for Support Vector Classification

I have a feature set that contains approximately 2 dozen features of technical analysis indicators. My own domain knowledge tells me that some of these features are better than others for predicitive ...
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0answers
18 views

Feature engineering one step at a time or in bunches?

Currently, I'm working on my very first classification project. If you want to know what dataset I'm working with, think "playing stairway to heaven in your local guitar store", and it will probably ...
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0answers
21 views

Which outlier detection algorithms give a breakdown of the contribution from each feature?

I am looking for an algorithm that outputs a breakdown of which features contributed the most towards a data point being labelled as an outlier. It can be supervised or unsupervised. At the moment, ...
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0answers
117 views

Keras most important features for text classification

I am working on a problem where I need to classify phrases in one of the two categories (let's A & B). I used the Keras SepCNN model (similar to this) for that and it is giving me some results. ...
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1answer
4k views

How to get feature importance from a keras deep learning model?

In case of scikit-learn's models, we can get feature importance using the relevant attributes of the model. I've been working on a RNN, using LSTMs for text embedding. Is there any way to get ...
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1answer
116 views

order of features importance after make_column_transformer and pipeline

I have a data preparation and model fitting pipeline that takes a dataframe (X_trn) and uses the ‘make_column_transformer’ and ‘Pipeline’ functions in sklearn to prepare the data and fit XGBRegressor. ...
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2answers
41 views

If a categorical feature only occurs a few times in a data set, should I drop it?

I have a data set of mostly categorical variables. When I one-hot encoded them some of the features occur less than 3% of the time. For instance the Tech-support feature only occurs 928 times in a ...
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2answers
46 views

Can I use more features for my training data than my test data will supply?

I am pretty new to the data science game so pardon me, if the answer to my question should be a no-brainer. We are looking at manufacturing / quality data where products are labeled 'okay' or 'not ...
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2answers
151 views

model with features of different sizes

I want to train a model (either classification or regression, doesn't matter) with features/inputs of different sizes, but I am not sure how to do it. For example, for each data-point, feature 1 and ...
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1answer
26 views

what features can I get from the sample?

I have dataset of 100 000 words labeled by surname(is last name / not last name) Example: kitchen | 0 kennedy | 1 etc. I tried extract lenth of word, count of each letter and such simple features ...
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2answers
128 views

What's the meaning of precomputed features?

When i learn about deep learning, I found dataset with precomputed features form. Link (http://cs.stanford.edu/people/karpathy/deepimagesent/coco.zip). What's the different with usual dataset?
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2answers
723 views

SHAP value analysis gives different feature importance on train and test set

Should SHAP value analysis be done on the train or test set? What does it mean if the feature importance based on mean |SHAP value| is different between the train and test set of my lightgbm model? ...
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1answer
21 views

How to choose the features for an algorithm from the given attached screenshot?

How to choose the features from the given attached heat map & correlation factor for the classification algorithm? I have 6 different features i.e., ac233fc01403, ac233fc02eaa, ac233fc015f6, ...
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2answers
54 views

Interpretation of PCA visualisation

I am trying to build a classifier to predict the ratings of a show during a specific time. I have extracted around 109 features, some relating to the time field namely, Day of Year Month of year ...
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2answers
686 views

Finding Feature Importance in CNN's?

Let's say I have images of cars. For each image in the dataset, I have let's say 3 pictures of the same car but in different angles. 1) The first image is the picture of the car from the front. 2) ...
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0answers
52 views

One feature - several units

I have a dataframe where one of the features is the Mileage expressed in some cases in $\frac{km}{l}$, while in others is expressed in $\frac{km}{kg}$, according to the combustion type of the car (so ...
1
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1answer
32 views

What is the level of measurement / name of the scale of list-features?

If you look at publications, you can have a dataset title of publication list of authors number of pages year of publication The Level of measurement of "number of pages" is interval scale, the ...
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2answers
289 views

How do you apply hypothesis testing to your features?

How do you apply hypothesis testing to your features in a ML model? Let say for example that I am doing a regression task and I want to cut some features (once I have trained my model) to increase ...