Joinery shell

Joinery has already proved useful multiple times for doing data processing and simple EDA. It has an interactive shell for doing EDA and you get an answer instantly.

If the data is already in the CSV format, then the Joinery shell can be called from the system console:

$ java joinery.DataFrame shell

You can see the examples at So if your data is already in CSV, you are good to go, just follow the instructions from there.

Here, in this book, we will look at a more complex example when the DataFrame is not in CSV. In our case the data is in JSON, and the Joinery shell does not support that format, so we need to do some pre-processing first.

What we can do is to create a DataFrame object inside ...

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