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st: Isolate the 'if statement' from a regression command


From   "Lythgoe, Dan" <D.Lythgoe@liverpool.ac.uk>
To   "'statalist@hsphsun2.harvard.edu'" <'statalist@hsphsun2.harvard.edu'>
Subject   st: Isolate the 'if statement' from a regression command
Date   Mon, 28 May 2012 13:06:47 +0000

Dear statalist,

Is there a simple way to isolate the 'if statement' from a regression command line for storage as a local macro? Ideally we could do with being able to parse using "if" in -tokenize-, but parse() only accepts single characters and instead parses on "i" and "f":

Sysuse auto

reg price mpg headroom if foreign==1
local cmdline `e(cmdline)'
tokenize "`cmdline'", parse("if")
di "`1'" " | " "`2'" " | " "`3'"

Kind regards
Dan

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