[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]
st: RE: RE: manipulating string variables
To Alex's clear exposition two footnotes can be added.
1. In Stata terminology, these are not variables at
all, but (global) macros.
2. In Stata 9, -index()- is documented as -strpos()-.
> Here are some basic examples:
> . clear
> . global testglobal "hello world, how are you today"
> . display "$testglobal"
> hello world, how are you today
> . display index("$testglobal","you")
> . display index("$testglobal","me")
> . global testglobal2 = subinstr("$testglobal","today","tomorrow",.)
> . display "$testglobal2"
> hello world, how are you tomorrow
> Suppose I declare a global variable
> global myglobal "hello world, how are you today"
> now what I want to do is the following:
> a) see whether the string text today exist in $myglobal
> b) replace "today" by "tomorrow"
> c) instead of "are" I need to change the "a" to "b" let's say.
> I know this does not make sense to you right now but I have all these
> regressions defined as global variables and need to manipulate them.
> Can this be done in Stata?
> I have checked strmatch and the likes but am not able to work
> it. I am
> looking for something like grep, sub and the likes in Linux.
* For searches and help try: