Calculating Mean of Rows Based on Column Value in Numpy and Pandas

Applying the Rollmean Function from Zoo in R: A Comparative Approach to Dataframe Transformation

Grouping by Cluster and Organization: A Step-by-Step Guide to Calculating Average Time Using Pandas

5 Closest Cities to Each City: A Step-by-Step R Code Solution

Annotating Means in Multiple ggplot2 Graphs Using Dplyr

Creating a Table with Means and Frequencies of Variables by Sex using R's data.table Package

Finding the Average of Several Lines with the Same ID in Big R Dataframes