Monthly Archives: July 2019

The art of regular expression

Posted on July 9, 2019 by Kai Chen

Regular expression is a powerful tool to do text search. It is the foundation of a lot of textual analysis research, though today’s textual analysis in computer science has gone far beyond text search. Regular expression operations are programming language … Continue reading →

Posted in Python | 1 Comment

Stata commands to change variable names or values of string variables to all lowercase

Posted on July 9, 2019 by Kai Chen

Stata is a case-sensitive application. Sometimes this will cause a trouble. So, we may want to change variable names or values of variables to all lowercase before we start processing data. This post gives a fast way to do this. … Continue reading →

Posted in Stata | 2 Comments

Common commands to deal with date in Stata

Posted on July 9, 2019 by Kai Chen

egen compdatadate=eom(fiscalmonth fiscalyear) format compdatadate %td To be continued …

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Stata command to order tabulation result with only top values shown

Posted on July 5, 2019 by Kai Chen

tabulate varname command is handy in Stata, but sometimes it returns a too long result, if varname contains too many unique values. The third-party command, groups, will solve the problem by showing top values only. Please use ssc install groups … Continue reading →

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