ftools

Fast Stata commands for large datasets.

ftools, written by Sergio Correia, includes commands such as fcollapse for creating datasets of summary statistics, fmerge for merging datasets with one-to-one or many-to-one matching, and flevelsof for identifying distinct levels of a variable. The ftools suite also includes a Mata class for working with factors. The Stata commands in ftools are based on this Mata class. You can use it to implement your own commands too.

安装

cap ado uninstall ftools
ssc install ftools