st: RE: Dates - converting time periods to inividual records

["Jonathan Cox" <Jonathan.Cox@lshtm.ac.uk>]

David
That works a treat - *many* thanks.

>>> david.harrison@icnarc.org 14:58 07/02/06/06 >>>
How's this...?

. list

     +-------------------------------+
     |     start         end   value |
     |-------------------------------|
  1. | 01jan2006   03jan2006       4 |
  2. | 05jan2006   11jan2006       9 |
     +-------------------------------+

. gen id=_n

. gen dur=end-start+1

. expand dur
(8 observations created)

. bysort id: gen date=start+_n-1

. format date %d

. list

     +------------------------------------------------------+
     |     start         end   value   id   dur        date |
     |------------------------------------------------------|
  1. | 01jan2006   03jan2006       4    1     3   01jan2006 |
  2. | 01jan2006   03jan2006       4    1     3   02jan2006 |
  3. | 01jan2006   03jan2006       4    1     3   03jan2006 |
  4. | 05jan2006   11jan2006       9    2     7   05jan2006 |
  5. | 05jan2006   11jan2006       9    2     7   06jan2006 |
     |------------------------------------------------------|
  6. | 05jan2006   11jan2006       9    2     7   07jan2006 |
  7. | 05jan2006   11jan2006       9    2     7   08jan2006 |
  8. | 05jan2006   11jan2006       9    2     7   09jan2006 |
  9. | 05jan2006   11jan2006       9    2     7   10jan2006 |
 10. | 05jan2006   11jan2006       9    2     7   11jan2006 |
     +------------------------------------------------------+
 

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu 
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Jonathan
Cox
Sent: 07 February 2006 14:44
To: statalist@hsphsun2.harvard.edu 
Subject: st: Dates - converting time periods to inividual records

Greetings,
I'd be grateful for any assistance with the following query regarding
dates in Stata:

Currently I have a dataset with 3 columns: start date of observation;
end date (typically a few days later) of observation; value.  What I
would like to do is turn this into a dataset for individual days - and
assign the value for the time period to each date individually.  I
guess
this is a sort of inverse of the collapse function.

Has anybody come across anything like this before?

Many thanks

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*
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