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Bartosz Mikulski
Building trustworthy data pipelines because AI cannot learn from dirty data
All Stories
Calculating the cumulative sum of a group using Apache Spark
How to use the window function to calculate a cumulative sum
How to write to a Parquet file in Scala without using Apache Spark
Row number in Apache Spark window — row_number, rank, and dense_rank
This article is mostly a “note to self” because I don’t want to google that anymore ;)
How to display all columns of a Pandas DataFrame in Jupyter Notebook
Review of “Conversations On Data Science” by Roger D. Peng and Hilary Parker
The silly mistakes in exploratory data analysis
Understanding the softmax activation function
Softmax function explained
How to increase accuracy of a deep learning model
Debugging a machine learning model
Smoothing time series in Pandas
How to use the exponentially weighted window functions in Pandas
Which hyperparameters of deep learning model are important and how to find them
How to speed up finding the right hyperparameters of a machine learning model
How to choose the right mini-batch size in deep learning
How to deal with underfitting and overfitting in deep learning
The lessons learned from Andrew Ng’s online course
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