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st: RE: RE: RE: RE: inputting string variables in comma-separated files


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: RE: RE: inputting string variables in comma-separated files
Date   Thu, 20 May 2004 16:19:48 +0100

In this circumstance, and assuming that there is no way to tell 
from the data, or otherwise, how many digits there should be, you must 
return to your data file. Adrian Mander suggested 
a solution which assumed that you were using Excel. 
Another is to surround strings with "". 

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

> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of 
> Rebecca Kalmus
> Sent: 20 May 2004 16:13
> To: statalist@hsphsun2.harvard.edu
> Subject: st: RE: RE: RE: inputting string variables in comma-separated
> files
> 
> 
> That's helpful, thanks.  However, that only works if the 
> variable has the
> same number of digits for all observations.  Suppose one 
> observation is
> 001 and another is 0001, both of which are read into Stata as 
> 1, and no
> observation has more than four digits for this variable.  In that case
> tostring will turn this variable into 0001 for both these 
> observations.
> 
> Rebecca Kalmus
> 
> *********************************************************************
> 
> I think what Nick was trying to get at is that you can 
> recreate your lost
> leading zeroes by using the -format()- option in -tostring- 
> as illustrated
> below.
> Joseph Coveney
> --------------------------------------------------------------
> ------------------
> . clear
> . set obs 5
> obs was 0, now 5
> . generate int x = 10^(_n - 1)  // <- original comma-separated values
> . tostring x, generate(sx) format(%05.0f)  // note the format--leading
> zeroes
> sx generated as str5
> . clist, noobs
>        x         sx
>        1      00001
>       10      00010
>      100      00100
>     1000      01000
>    10000      10000
> --------------------------------------------------------------
> ------------------
> From: Rebecca Kalmus wrote:
> Once I've read the comma-separated file into Stata, Stata has 
> already read
> the variable as numeric.  The leading zeros are already gone, so
> converting the variable to string using tostring doesn't help.
> In the past I've gotten around this problem by converting the
> comma-separated file to Stata format using Stat/transfer, 
> with which I can
> specify that the variable should be read as string.  However, it seems
> like there should be a more straightforward solution.
> Rebecca Kalmus
> > >From   "Nick Cox" <n.j.cox@durham.ac.uk>
> > To   <statalist@hsphsun2.harvard.edu>
> > Subject   st: RE: inputting string variables in 
> comma-separated files
> > Date   Tue, 18 May 2004 19:46:19 +0100
> >
> > A good bet in this circumstance is to make
> > it a string variable again using -tostring-.
> > Make sure you specify a format which produces
> > leading zeros.
> >
> > Nick
> > n.j.cox@durham.ac.uk
> >
> *
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