Selecting Certain Observations Plus Before and After Dates Using R

Creating a List of 2X3X3 Correlation Matrices Using tidyr and dplyr in R to Analyze Variable Evolution Over Time.

Calculating Time Difference in R by Group Based on Condition Using dplyr and lubridate Packages

How to Add Multiple Lags and Shifts to Columns in R Using Dplyr Library

Filtering Data to One Daily Point Per Individual Using dplyr in R

Enabling tbl_df Objects in R: Simplifying Data Frame Handling

Handling Pivoted Data with Variable Length Columns in R: Solutions and Best Practices

Assigning Sequential Values to Unique COL2 in Dplyr: A Solution for Handling Missing Values in Grouped Data

Using summarise_each() to Apply Functions to Non-group_by Columns in Dplyr

Creating a Single DataFrame by Aggregating Multiple DataFrames in R Using Nested sapply Functions