What are aggregate functions in Pandas?
Aggregate functions in Pandas are used to perform operations on a group of data, such as sum, mean, or count.
Can you give me an example of using the groupby method with an aggregate function?
Sure! You can use df.groupby('column_name').agg('sum')
to get the sum of values grouped by 'column_name'.
What other aggregate functions can I use with groupby?
You can use functions like 'mean', 'count', 'min', 'max', and even custom functions with agg()
.
How do I apply multiple aggregate functions at once?
You can pass a list of functions to agg()
, like this: df.groupby('column_name').agg(['sum', 'mean', 'count'])
.
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