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Yufeng

Yufeng
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Towards Data Science

How to Merge Data Frames by The Nearest Match in Pandas? Use merge_asof.

A short post about a useful function in Pandas, merge_asof. It’s one of the most used tools in Pandas when dealing with time series data.

Feb 18

How to Merge Data Frames by The Nearest Match in Pandas? Use merge_asof.

Feb 18

Yufeng

Use Set Instead of List in Membership Test, Especially for Large Datasets

Prioritize the O(1) operation instead of one-liners in your Python code

Feb 16

Use Set Instead of List in Membership Test, Especially for Large Datasets

Feb 16

Yufeng
in
Towards Data Science

Implement Agglomerative Hierarchical Clustering with Python

In this post, I briefly go over the concepts of an unsupervised learning method, hierarchical clustering, and its implementation in Python

Jan 18

Implement Agglomerative Hierarchical Clustering with Python

Jan 18

Yufeng

Efficient Data Loading with Pandas

Mastering Efficient Data Loading: Practical Techniques and Code Examples in Pandas

Dec 22, 2023

Efficient Data Loading with Pandas

Dec 22, 2023

Yufeng

Unlocking the Power of assign() in Pandas

Creating new columns efficiently using Pandas' assign() method

Jul 20, 2023

Unlocking the Power of assign() in Pandas

Jul 20, 2023

Yufeng
in
Towards Data Science

Slicing A Pandas Dataframe Using “&” and “|” Instead of “and” and “or”

when you see ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all()

Apr 14, 2023

Slicing A Pandas Dataframe Using “&” and “|” Instead of “and” and “or”

Apr 14, 2023

Yufeng
in
Towards Data Science

Use to_string() to Stop Python from Hiding the Body of the Printed DataFrames

What should we do to see the entire printed dataframe after the execution of a Python script?

Apr 10, 2023

Use to_string() to Stop Python from Hiding the Body of the Printed DataFrames

Apr 10, 2023

Yufeng
in
Towards Data Science

What If .apply() Is Too Slow?

Sometimes we need to apply some function to the Pandas Dataframe in Python by using its column(s) as the function's input. However, one of…

Dec 8, 2022

What If .apply() Is Too Slow?

Dec 8, 2022

Yufeng
in
Towards Data Science

Understanding Affinity Propagation Clustering And Implementation with Python

One of the most used clustering methods, affinity propagation, is clearly explained together with the implementation with Python

Sep 2, 2022

Understanding Affinity Propagation Clustering And Implementation with Python

Sep 2, 2022

Yufeng

TypeError: unhashable type: ‘list’! How to Drop Duplicates with Lists in Pandas

In this short post, I’m writing about several tricks about dealing with list values in the data frame in Pandas. You may find them useful…

Jul 22, 2022

TypeError: unhashable type: ‘list’! How to Drop Duplicates with Lists in Pandas

Jul 22, 2022

Yufeng

Yufeng

Ph.D., Data Scientist and Bioinformatician. Support my writing by becoming one of my referred members: https://jianan-lin.medium.com/membership

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