Questions tagged [anomaly]
The anomaly tag has no usage guidance.
4
votes
2answers
161 views
Anomaly detection without any knowledge about structure
I have an interesting question, my code needs to be able to handle structured data where I don't know much about the structure at development time. I know the samples follow a schema that can be ...
0
votes
1answer
30 views
Explaination of the anomalies detected
I have a dataset with a mixture of categorical and numeric variables. I have converted categorical variables into one hot encoding. I have used Isolation forest algorithm to extract 5% of the ...
0
votes
1answer
215 views
Anomaly Detection for Large Time Series Data [closed]
I am working on detecting anomalies within a large time series data set. It is updated on a regular basis and consists of more than 30 parameters. I am using R as a reference language.
It is a first ...
1
vote
4answers
279 views
How to detect anomalous points
As is clear from the figure, the blue points, which don't follow the trend, are anomalous points.
I'm wondering about the best non-parametric method to detect those points. I have tested some ...
2
votes
1answer
2k views
How to improve precision under imbalanced classification
I am using an imbalanced dataset (rare positive cases) to learn models for prediction and the final good AUC is 0.92 but the F1 score is very low0.2.
Is it possible to add some key features which ...
