T. Qin

fixed bugs in test_tsfresh

6

## Reference Issues/PRs ## What does this implement/fix? Explain your changes. Now all tests in test_tsfresh.py should pass. 1. I am not sure about the necessity of "test_ratio_beyond_r_sigma_nan_case". The "nan_case"...

Feature Bundles

3

Let's brainstorm some useful feature bundles (features that are likely to be generated together). Some common ideas are: 1. Diagnostic features. Features that detect anomaly in time seres. 2. Pattern...

Design a more standard documentation format. Provide more examples of usages for documentations.

0. Stemming. Snowball stemming. Only English. 1. Count Vectorizer, mostly done 2. TFIDF Vectorizer, mostly done 3. Text related metrics, cosine_similarity, Levenshtein distance are done. Some others? Like Jaccard similarity...

Find better and larger datasets to test 1. Correctness and 2. Performance. Create dedicated test folder and pytests.

Add a couple more Feature Selection Algorithms

3

Some additional feature selection algorithms of interest: Here are some ideas. 1. ROC-AUC. Run a logistic regression on one feature and use its AUC as an indicator to feature strength....

Optimize for simple math?

5

### Checks - [X] I have checked that this issue has not already been reported. - [X] I have confirmed this bug exists on the [latest version](https://pypi.org/project/polars/) of Polars. ###...