Track 14 · Lesson 8 of 12

Grouping and aggregating

Answer per-group questions with groupby, compute several statistics at once with agg, and build two-way summaries with pivot_table and crosstab.

You will be able to

• Explain the split-apply-combine idea behind groupby
• Aggregate one or more columns per group, with one or several functions
• Name output columns with named aggregation in agg
• Build a two-way table with pivot_table and count combinations with crosstab