Stefan

Stefan has asked 5 questions and find answers to 117 problems.

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About

Economist, entrepreneur and data scientist. Author of

Machine Learning for Algorithmic Trading
Hands On Unsupervised Learning
Mastering Unsupervised Learning
Importing and Managing Financial Data in Python
Manipulating Time Series Data in Python

Stefan questions

Python multiprocess with pool workers - memory use optimization
Vectorize haversine distance computation along path given by list of coordinates
Copy text between parentheses in pandas DataFrame column into another column
How to insert pandas dataframe via mysqldb into database?

Stefan answers

count of last n days per group
Create Multiindex from pattern in column names
How to apply a randomforest classifier to all of the dataset, a small section at a time in python
How do I merge duplicate rows into one on a DataFrame when they have different values
Pandas DataFrame Window Function
Pandas DataFrame groupby overlapping intervals of variable length
Linear regression using Python (Pandas and Numpy)
Transform pandas Timestamp to end of current month
how to read date and time on ecmwf file
Pandas: How do I split multiple lists in columns into multiple rows?