How to Select Rows in a DataFrame Between Two Values?

Selecting Rows in a DataFrame Between Two Values

When working with DataFrames, you may need to filter the data based on specific criteria. One common scenario is selecting rows where the values in a particular column fall within a specified range.

Problem:

You have a DataFrame df and want to modify it to include only rows for which the values in the column closing_price are between 99 and 101. You try the following code:

df = df[99 <= df['closing_price'] <= 101]

However, you encounter the error:

ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all()

Solution:

To resolve this issue, use the between method of the Series:

df = df[df['closing_price'].between(99, 101)]

The between method takes two arguments: the lower and upper bounds of the range. It returns a boolean Series indicating which rows meet the specified condition. By passing this boolean Series to the square brackets ([]), you can select the corresponding rows from the DataFrame.

The above is the detailed content of How to Select Rows in a DataFrame Between Two Values?. For more information, please follow other related articles on the PHP Chinese website!