411 REFERENCE · Wikibooks
Stata/Natural Language Processing
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Reading a text file
If lines are short (less than the 244 string characters), one can use insheet. This command will read the text file into Stata's memory.
. insheet using toto.txt, clear
String functions
First have a look at the list of string functions already included in Stata.
. h string functions
Regular Expressions
Stata includes commands for regular expressions regexm(), regexr() and regexs().
Regular Expression in Stata on UCLA STATA Website
Regular Expressions on STata website
Wordscores
Ken Benoit, Michael Laver and Will Lowe have developed wordscores, a set of Stata command which read textfiles, count the frequency of each word and compute some index of similarity between texts.
Wordscore page