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Re: st: Reshape, Duplicate Observations


From   abiswas@clarku.edu
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Reshape, Duplicate Observations
Date   Fri, 21 Aug 2009 23:59:58 -0400 (EDT)

Hi Tirthankar,

Thanks for the reply. However, this is not the one I need. Basically, for
each observation I need hid date their corresponding nids and those nid's 
all possible dates. If you look at my table 3 you will understand what
exactly I want. In your solution what I am getting is that each row
incorporates within group hid dates only.

Thanks.

Arnab




> <>
> Is this perhaps what you want?
> ***************************************
> clear*
> input str2 hid  str15 date       fd
>     A   "01/03/2005"    0
>     A   "04/05/2006"    1
>     B   "02/03/1999"    1
>     B   "09/07/2004"   1
>     B   "09/07/2004"   0
>     C   "05/02/2004"   0
>     C   "03/11/2004"   1
>     D   "05/08/1998"   0
> end
> save 1, replace
> ******************
>
> bys hid: g j=_n
> reshape wide date fd, i(hid) j(j)
> save 2, replace
> clear
> ******************
>
> input str2 hid  str2 nid1   dist1   str2 nid2   dist2
> 	 A      B     .75      C     .25
> 	 B      D     .35      A     .75
> 	 C      E     .65      A     .25
> 	 D      B     .35       ""       .
> end
> save 3, replace
> ******************
>
> use 1
> joinby hid using 2
> joinby hid using 3
> list, clean
> ***************************************
>
>
> On Sat, Aug 22, 2009 at 1:05 AM, <abiswas@clarku.edu> wrote:
>> I have a dataset with multiple observations (both unique and duplicate)
>> for each identifier HID. Here is an example
>>
>>                           Table 1
>>
>>        HID    DATE       FD
>>
>>  1.     A   01/03/2005    0
>>  2.     A   04/05/2006    1
>>  3.     B   02/03/1999    0
>>  4.     B   09/07/2004    1
>>  5.     B   09/07/2004    0
>>  6.     C   05/02/2004    0
>>  7.     C   03/11/2004    1
>>  8.     D   05/08/1998    0
>>
>>
>> I have another dataset (already reshaped widely) as follows
>>
>>                           Table 2
>>
>>      HID    NID1   DIST1   NID2   DIST2
>>
>> 1.      A      B     .75      C     .25
>> 2.      B      D     .35      A     .75
>> 3.      C      E     .65      A     .25
>> 4.      D      B     .35              .
>>
>>
>> Now, I want to gather information by HID on a set of other variables
>> DATE
>> and FD so that each observation in Table 2 contains information on HID
>> DATE NID* and their corresponding dates, DIST* and FD*. I am not allowed
>> to drop the duplicate observation (obs. 4 & 5) since each of them
>> contains
>> important information. The outcome table that I am looking for is as
>> follows
>>
>>                                                
>>                               Table
>> 3
>>
>>  HID    DATE    FD NID1 DIST1 DATE1    DATE2   DATE3    FD1
>> FD2 FD3 NID2
>> DIST2 DATE* FD*
>>
>>  1.  A   01/03/05   0   B   .75 02/03/99 09/07/04 09/07/04  0  
>>  1   0
>> C   .25
>>  2.  A   04/05/06   1   B   .75 02/03/99 09/07/04 09/07/04  0  
>>  1   0
>> C   .25
>>  3.  B   02/03/99   0   D
>>  4.  B   09/07/04   1   D
>>  5.  B   09/07/04   0   D
>>  6.  C   05/02/04   0   E
>>  7.  C   03/11/04   1   E
>>  8.  D   05/08/98   0   B
>>
>> Basically, my plan is to know for each group (obs.) of HID and DATE the
>> corresponding NIDS which are within a year from the DATE and their
>> corresponding total number of FDs. Thatâ??s why I think I need to go
>> through
>> Table 3.
>>
>> Thanks in advance.
>>
>> *
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>>
>
>
>
> --
> To every Ï?-consistent recursive class κ of formulae there correspond
> recursive class signs r, such that neither v Gen r nor Neg(v Gen r)
> belongs to Flg(κ) (where v is the free variable of r).
>
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