Selecting All Values of a Variable for Which There Is Data for Every Year in R

Retrieving Minimum Date for Each Item Key in Two Tables While Excluding Duplicates

Formatting Ambiguous Dates with R: A Step-by-Step Guide to Parsing and Recoding Date Formats

Resample Data Table with Irregular Time Intervals Using R's data.table Package

Filtering Data Based on Time Interval: A Comprehensive Guide to Using difftime and dplyr in R

Calculating Average Number of Days Grouped by Month in R: A Step-by-Step Guide

Remove Duplicates from R Data Frame Based on Date Using Various Functions and Techniques

Understanding Date Import in R: A Step-by-Step Guide to Accurate Date Analysis

Performing Non-Equi Inner Joins on Data Ranges with data.table in R

How to Extract Year and Quarter Values from Quarterly Dates Using R: A Comparative Analysis of Base R, plyr, and Car Packages