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Tag: outliers

Remove outlier using quantile python

I need to remove outlier for a regression dataset. Lets say the dataset is consist in the following way With closer inspection, the column humidity has three outliers which are 50.0,18.0,0.01 but for windspeed column the outliers are 20 and 0.05 and both columns outliers are not in the same row. In this case if I remove my outlier with

Fixing points as non-outliers during outlier detection in Python

I found this Scikit Learn page explaining how to use different algorithms to detect outliers: https://scikit-learn.org/stable/modules/outlier_detection.html Is it possible to set a group of instances as non-outliers so that the algorithms understand that those specific points should not be detected as outliers? Answer If you have enough so called non-outliers for training, one option is to use Novelty detection with

Problem with plotting peaks using find_peaks from SciPy to detect drastic up/down turns or global outliers

Let’s say I have following dataframe contains value over time or date: I inspired from this answer to detect peaks and valleys via below code: This is the output: The problems: I can’t figure out how I can configure find_peaks() documentation to reach meaningful/drastic peaks & valley with respect to threshold as global outliers. I also checked this post but

Isolation Forest vs Robust Random Cut Forest in outlier detection

I am examining different methods in outlier detection. I came across sklearn’s implementation of Isolation Forest and Amazon sagemaker’s implementation of RRCF (Robust Random Cut Forest). Both are ensemble methods based on decision trees, aiming to isolate every single point. The more isolation steps there are, the more likely the point is to be an inlier, and the opposite is

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