Merging Rows by Subject Number: A Guide to Longing Data in R

Identifying Identical Rows and Verifying Differing Values with a Constant K in Large Datasets

Merging Multiple Rows in R Using dplyr and tidyr

Adding Rows for Days Outside Current Window in a Time Series Dataframe Using R

Merging Rows with the Same ID, but Different Values in One Column to Multiple Columns Using Pandas and Python