Re: st: splitting strings

[Eric Booth <ebooth@ppri.tamu.edu>]

<>

Scott's solution doesn't check V2 for the word that should parse V1 (within the same observation), but instead checks whether V1 contains some text found anywhere in V2.  
This could be a problem if V1 contains segments that can be found in several levels of V2, see the 3rd observation I added below:

***!
clear
input str29 v1 str10 v2
"hello John Smith how are you?" "John Smith"
"I’m fine Jane, how about you?" "Jane,"
"I'm Jane, but you're John Smith, right?" ", ri"
end
levelsof v2
return list
split v1, parse(`=r(levels)')
l
***!

Nick's solution would split the 3rd obs on "ri", but Scott's would split it on "Jane" from the 2nd obs.

- Eric
__
Eric A. Booth
Public Policy Research Institute
Texas A&M University
ebooth@ppri.tamu.edu
Office: +979.845.6754



On Feb 10, 2011, at 7:20 AM, Scott Merryman wrote:

> If the data set is small  then this should work:
> 
> clear
> input str29 v1 str10 v2
> "hello John Smith how are you?" "John Smith"
> "I’m fine Jane, how about you?" "Jane,"
> end
> levelsof v2
> return list
> split v1, parse(`=r(levels)')
> l
> 
> Scott
> 
> 
> On Thu, Feb 10, 2011 at 7:08 AM, Daniel Henriksen
> <henriksen.dp@gmail.com> wrote:
>> I'm sorry, the example is unreadable.
>> In observation one :
>> V1: hello John Smith how are you?
>> V2 John Smith
>> V1_1 hello
>> V1_2 how are you?
>> 
>> Observation two:
>> V1: I’m fine Jane, how about you?
>> V2: Jane,
>> V1_1 I'm fine
>> V1_2 how about you?
>> 
>> So the splitting of V1 varies from observation to observation
>> depending on the string text in V2
>> Hope this makes sense
>> 
>> /Daniel
>> 
> 
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