The apply() Method
Explore how to use the apply method with pandas DataFrames to perform operations on rows or columns. Understand when to use apply and when vectorized alternatives are more efficient, helping you optimize your data manipulation workflows.
We'll cover the following...
We'll cover the following...
Like the series, the DataFrame has an apply method. As with Series,
we should be wary of using the apply method in DataFrames. More specifically, if we’re dealing with numbers, we might want to see if we can operate in a vectorized way.
Also, keep in mind that a DataFrame is two-dimensional. So rather than applying a function to a single value, when we call apply on a DataFrame, we work on a whole row or a whole column. Because of that, this method is rarely used. ...