Questions tagged [feature-construction]

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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: ...
3
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0answers
148 views

Label Encode with pre defined classes

I have trained a model (Random Forest) and now I want to use it to predict for a certain data on a particular day. I have a categorical column where there are some values(say a,b,c,d,e) over a period. ...
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0answers
76 views

What are best practices for collaborative feature engineering?

I work in a large company on several data science projects. For each of the projects me and my colleagues construct features that have some predictive value for the specific target in that project. ...
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0answers
15 views

Data Lineage/Traceability in Pipelines

I want to collect information about: 1) from which single data signals a feature is composed in a ML pipeline and 2) what data preprocessing operations are/were executed on a data signal. Does anyone ...
1
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1answer
39 views

How to model a supervised recommender system with varying data

Suppose there are 2000 movies and a company wants to recommend some movies (for example, at most 5 movies) to each visitor. The objective is to learn how to predict which movie will be selected if a ...
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0answers
23 views

Is there a common relationship between data inputs and the number of attainable features?

Is there a known relationship between the amount of information gain that comes from new data added to a dataset? for eg: If I have a plant watering system that tells me: An integer of how wet the ...
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0answers
38 views

Extracting Features for Graph transformation

Suppose I have a directed graph G (V,E) whose transformation is defined by a library of patterns. Each vertex is of particular type. The library of patterns contain subgraphs (g1,g2,g3 etc)and it's ...
1
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1answer
74 views

NLP Feature creation from phrase matching

I'm building a model to classify email content, to decide whether the email should lead to a JIRA ticket being "Raised" or "Not Raised". The problem I am having is the data is highly imbalanced with ...
1
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0answers
32 views

Orange Feature Construction widget: Inability to see formulas while file sharing

Our team is sharing Orange "work bench" files across team members. Unfortunately, we find the Feature Construction widget does not display code consistently (nor is there any "x" to indicate an error)....
1
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1answer
186 views

Feature construction widget on Orange 3.13

I got stucked with this widget... I am an absolute beginner and I am now working with Orange software for my thesis with logs and core data. I need to combine different features to compare them. What ...
1
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2answers
95 views

How to treat the undefined values which make sense?

I'm currently trying to create a few features to improve the performances of a model. One of those features that I would like to create corresponds to the difference in days between a customer's ...
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0answers
13 views

Converting the continuous numerical features into gaussian distribution and how to deal with NaN values after that?

I have a dataset in which there are few continuous numerical features that distribution over them is non gaussian and this means, skewness is nonzero (positive or negative). I read that it is good to ...
0
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2answers
33 views

Problem with a feature (normal distribution + peak around 0)

I have a feature that shows a characteristic of the instances. That characteristic can be present or not. If present it shows an almost normal distribution of values (actually a bit skewed to the ...
0
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1answer
21 views

How to group categorical columns into similar types?

(Forgive me if the question is ill put. I am a novice in data science. Please comment or edit so that the question can be improved) I have a dataset where we have to predict the future sale of a shop....
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1answer
24 views

Representing user information

I have a task of representing a users feature matrix , i have features like gender , age etc but I also have a multivalue feature called as "movies watched" which is essentially another table of ...
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0answers
41 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
79 views

Suitable aggregations (mean, median or something else) to make features?

Trying to solve a classification problem using a large number of features, some are individual numbers from a signal while others are aggregates of values to create a feature (median, mean etc). I ...
-1
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1answer
52 views

How do I create my features

I am working on the prediction of the behaviour of a new well in a map. The data that I have is a map in a form of a grid and its properties (9 of them), and a set of wells with the position of each ...