Re: st: RE: RE: manipulating string variables

[Jean Eid <jeaneid@chass.utoronto.ca>]

Thank you So much for the prompt reply.

Jean
Nick Cox wrote:
> 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()-. 
> Nick 
> n.j.cox@durham.ac.uk 
> Alex Ogan
>  
>   
> > 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")
> > 22
> >
> > . display index("$testglobal","me")
> > 0
> >
> > . global testglobal2 = subinstr("$testglobal","today","tomorrow",.)
> >
> > . display "$testglobal2"
> > hello world, how are you tomorrow
> >     
>  
> Jean Eid
>  
>   
> > 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.
> >     
> *
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>
>   
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