{utils}
open spreadsheet view of matrix-like object
{dplyr}
join two data sets keeping the observations that they have in common
{base}
return unique observations in x or y
{dplyr}
create or modify data columns
{dplyr}
join two data sets keeping the observations in the right one
{dplyr}
join two data sets dropping all observations in x that have a match in y
{dplyr}
join two data sets keeping the observations in the left one
{dplyr}
join two data sets keeping the observations in both
{base}
return only observations in both x and y
{base}
return observations in x but not y
{dplyr}
join two data sets keeping all observations in x that have a match in y
{dplyr}
count unique values of variables
{base}
join two data sets
The end!