FTOOLS: Stata module to provide alternatives to common Stata commands optimized for large datasets

Sergio Correia

Statistical Software Components from Boston College Department of Economics

Abstract: ftools consists of a Mata file and several Stata commands: The Mata file creates identifiers (factors) from variables by using hash functions instead of sorting the data, so it runs in time O(N) and not in O(N log N). The Stata commands exploit this to avoid sort operations, at the cost of being slower for small datasets (mainly because of the cost involved in moving data from Stata to Mata). Implemented commands are fcollapse, fegen group, and fsort. Note that most of the capabilities of levels and contract are already supported by these commands. Possible commands include more egen functions and merge and reshape alternatives.

Language: Stata
Requires: Stata version 11.2
Keywords: levels; collapse; contract; egen; sort; factor variables; Mata (search for similar items in EconPapers)
Date: 2016-08-06, Revised 2023-08-21
Note: This module should be installed from within Stata by typing "ssc install ftools". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
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Downloads: (external link)
http://fmwww.bc.edu/repec/bocode/f/ftools.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/ftools.mata program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/ftools.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/f/fcollapse.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/fcollapse.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/f/fegen.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/fegen_group.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/fegen.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/f/fisid.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/fisid.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/f/flevelsof.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/flevelsof.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/f/fmerge.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/fmerge.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/f/freshape.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/fsort.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/fsort.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/f/ftab.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/j/join.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/j/join.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/l/local_inlist.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/l/local_inlist.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/f/fcollapse_functions.mata program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/fcollapse_main.mata program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/ftools_type_aliases.mata program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/ftools.mata program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/ftoolsFile-URL: ... bocode/_/common.mata program code (text/plain)
Our link check indicates that this URL is bad, the error code is: 404 Not Found
http://fmwww.bc.edu/repec/bocode/f/ftools_hash1.mata program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/ftools_main.mata program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/ftools_experimental.mata program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/ftools_plugin.mata program code (text/plain)
http://fmwww.bc.edu/repec/bocode/f/ftools_type_aliases.mata program code (text/plain)
http://fmwww.bc.edu/repec/bocode/m/msFile-URL:http ... e/_/compile_mata.ado program code (text/plain)
Our link check indicates that this URL is bad, the error code is: 404 Not Found
http://fmwww.bc.edu/repec/bocode/m/ms_expand_varlist.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/m/ms_fvstrip.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/m/ms_fvstrip.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/m/ms_fvunab.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/m/ms_get_version.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/m/ms_parse_absvars.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/m/ms_parse_varlist.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/m/ms_parse_vce.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/m/ms_addFile-URL: ... c/bocode/_/comma.ado program code (text/plain)
Our link check indicates that this URL is bad, the error code is: 404 Not Found

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