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st: RE: Splitting a textvariable


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Splitting a textvariable
Date   Wed, 12 May 2010 13:13:33 +0100

-inrange()- won't work as you want because the address is a string variable. I can think of two strategies here:

1. Use -split- to split into string and numeric components; then put them together again with a comma inserted. 

2. Use regular expression functions. 

3. Find the spaces with -strpos()- and stop when you reach the first space preceded by a number. 

There is some programming needed in each case. 

Nick 
n.j.cox@durham.ac.uk 

Tomas Lind

I have (in principle) a dataset that looks like this with an id-variable and
a text-variable with addresses. Unfortunately there are often several
addresses in the same variable. I have to split these into one variable for
the first address, another for the second and so on.

id   	address
---------------------------------------------------------------
1	Stockholm xroad 12 London yroad10
2	London zroad 31
3	Helsinki rroad 1 Oslo sroad 123 Berlin troad 13


Each address ends with a number. My idea is to put in a parsing "," in the
empty space after the number (to be able to use -split parse-. Like this.


id   	address
----------------------------------------------------------------
1	Stockholm xroad,12 London yroad10
2	London zroad 31,
3	Helsinki rroad 1,Oslo sroad123,Berlin troad 13



One idea to do this is to use something like (if we rename the
address-variable to a shorter name, x).

replace x[i]=","  if x[`i' - 1]==inrange(0, x[`i'], 9) & x[`i']==" "

I´m not sure about how to work out the details to get this into work. Any
help is welcome to put the commas into place. Other ideas are also welcome.


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