Categories / subset
Selecting and Filtering on the Same Variables in dplyr
Understanding the Issue with Subsetting R Data Frame Results in Mysterious NA Rows
Merging Rows Based on Conditional Criteria in DataFrames Using SQL
Subset Data for a Specific Column with ddply: A Deep Dive in R
Subsetting Panel Data in R: A Comparative Analysis of Base R and data.table Package
Subsetting Survey Design Objects Dynamically in R