Selecting Subsets of Data in Pandas: Part 3

Part 3: Assigning subsets of data

This is part three of a four-part series on how to select subsets of data from a pandas DataFrame or Series. Pandas offers a wide variety of options for subset selection which necessitates multiple articles. This series is broken down into the following topics.

1. Selection with [], .loc and .iloc
2. Boolean indexing
3. Assigning subsets of data
4. How NOT to select subsets of data

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Assignment

When you see the word assign used during a discussion on programming, it usually means that a variable is set equal to some value. For most programming languages, this means using the equal sign. For instance, to assign the value 5 to the variable x in Python, we do the following: