Pandas - directly add moving average columns from group by to dataframe...

Find half of each group with Pandas GroupBy...

How to rowwise-sort a matrix containing subgrouped data...

A loop to create multiple data frames from a population data frame...

Combining rows by index in R...

split, apply and combine on 2 columns of data...

Using groupby with expanding and a custom function...

Groupby cumulative mean with wide/long pivoting...

Calculating age per animal by subtracting years in R...

Avoiding the use of for loop for cumsum...

data.table: aggregate, join, and assign by reference...

MATLAB: return both arguments from ISMEMBER when used inside SPLITAPPLY...

Quantile threshold/filter within pandas groupby...

Building complex subsets in Pandas DataFrame...

python pandas, DF.groupby().agg(), column reference in agg()...

Python Pandas Aggregate Series Data Within a DataFrame...

Replacing dataframe values by median value of group...

How to use split-apply-combine pattern of pandas groupby() to normalize multiple columns simultaneou...

tidyr or dplyr equivalent of JMP split table...

Get most common column for each column value...

How to count rows in nested data_frames with dplyr...

pandas combine_first resulting in more number of rows...

Operate on columns based on a variable...

Pandas apply function to groups, and filter the original dataframe...

Assign column value (split apply combine) based on another column...

R Data transform - Columns to Rows and aggregate...

Pandas timestamp difference in groupby transform...

Correct use of dplyr functions to compute per-product sales in sliding-window, without needing extra...

Use dplyr's group_by to perform split-apply-combine...

Cut a variable differently based on another grouping variable...