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Re: st: dropped observations after append


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: dropped observations after append
Date   Mon, 20 Mar 2006 02:36:19 +0000 (GMT)

Michael:
I am not able to reproduce your problem. What are you doing differently from the example below?
One thing that jumps to mind is that in your output a dset 0 is immediately followed by a dset 1,
while if you just appended it all dset 0 should be underneath. Maybe something went wrong in a
past version of dset1.dta and you are pasting correctly underneath but if you look at the first
few lines you still see the mistakes made earlier. 

*----------------begin example------------------
set more off
drop _all

input id      dset    agev    male    meduse  afev1
2       0       10      1       0       -9
6       0       11      0       1       -9
15      0       11      1       1       -9
18      0       7       1       1       -9
20      0       10      1       1       -9
end
save c:\temp\dset2.dta /*, replace*/
drop _all

input id dset    agev    male    meduse  afev1
2       1       10      1       1       1.700833
6       1       11      0       0       2.084792
15      1       11      1       0       1.499583
18      1       7       1       0       1.183437
20      1       10      1       0       1.400417
end

append using c:\temp\dset2.dta
/*erase c:\temp\dset2.dta*/
list

*---------------end example------------------

HTH,
Maarten

--- Michael McCulloch <mm@pinest.org> wrote:

> Thanks Maarten; dset is float  %9.0g in both datasets.
> 
> At 04:42 PM 3/19/2006, you wrote:
> >Michael:
> >Is the variable dset in dset1.dta a string? (open dset1.dta and type -desc 
> >dset- to find out)
> >HTH,
> >Maarten
> >
> >--- Michael McCulloch <mm@pinest.org> wrote:
> >
> > > I have two datasets, (dset1.dta and dset2.dta).
> > > With dset1.dta, I append with the command: append using dset2.dta.
> > >
> > > dset1.dta has:
> > > id      dset    agev    male    meduse  afev1
> > > 2       1       10      1       1       1.700833
> > > 6       1       11      0       0       2.084792
> > > 15      1       11      1       0       1.499583
> > > 18      1       7       1       0       1.183437
> > > 20      1       10      1       0       1.400417
> > >
> > > dset2.dta has:
> > > id      dset    agev    male    meduse  afev1
> > > 2       0       10      1       0       -9
> > > 6       0       11      0       1       -9
> > > 15      0       11      1       1       -9
> > > 18      0       7       1       1       -9
> > > 20      0       10      1       1       -9
> > >
> > > After I append, why are values from the first dataset dset1.dta for the
> > > variable dset==1 are dropped?
> > > id      dset    wheeze  cough   meduse  afev1   male    agev    height
> > > anysx
> > > 2       0       0       0       0       -9      1       10      137.922
> > > 0
> > > 2       .       0       0       1       1.700833        1       10
> > > 137.922 0
> > > 6       .       0       1       0       2.084792        0       11
> > > 150.876 1
> > > 6       0       0       1       1       -9      0       11      150.876
> > > 1
> > > 15      .       0       1       0       1.499583        1       11
> > > 141.986 1
> > > 15      0       0       1       1       -9      1       11      141.986
> > > 1
> > > 18      .       0       0       0       1.183437        1       7
> > > 120.396 0
> > > 18      0       0       0       1       -9      1       7       120.396
> > > 0
> > > 20      .       0       0       0       1.400417        1       10
> > > 150.114 0
> > > 20      0       0       0       1       -9      1       10      150.114 0
> > >
> > >
> > >
> > >
> > > Best wishes,
> > > Michael
> > >
> > >
> > > ____________________________________
> > >
> > > Michael McCulloch
> > > Pine Street Clinic
> > > 124 Pine Street, San Anselmo, CA 94960-2674
> > > tel     415.407.1357
> > > fax     415.485.1065
> > > email:  mm@pinest.org
> > > web:    www.pinest.org
> > >          www.pinestreetfoundation.org
> > >
> > >
> > >
> > >
> > >
> > > *
> > > *   For searches and help try:
> > > *   http://www.stata.com/support/faqs/res/findit.html
> > > *   http://www.stata.com/support/statalist/faq
> > > *   http://www.ats.ucla.edu/stat/stata/
> > >
> >
> >
> >-----------------------------------------
> >between 1/2/2006 and 31/3/2006 I will be
> >visiting the UCLA, during this time the
> >best way to reach me is by email
> >
> >Maarten L. Buis
> >Department of Social Research Methodology
> >Vrije Universiteit Amsterdam
> >Boelelaan 1081
> >1081 HV Amsterdam
> >The Netherlands
> >
> >visiting adress:
> >Buitenveldertselaan 3 (Metropolitan), room Z214
> >
> >+31 20 5986715
> >
> >http://home.fsw.vu.nl/m.buis/
> >-----------------------------------------
> >
> >
> >
> >___________________________________________________________
> >Win a BlackBerry device from O2 with Yahoo!. Enter now. 
> >http://www.yahoo.co.uk/blackberry
> >*
> >*   For searches and help try:
> >*   http://www.stata.com/support/faqs/res/findit.html
> >*   http://www.stata.com/support/statalist/faq
> >*   http://www.ats.ucla.edu/stat/stata/
> 
> 
> Best wishes,
> Michael
> 
> 
> ____________________________________
> 
> Michael McCulloch
> Pine Street Clinic
> 124 Pine Street, San Anselmo, CA 94960-2674
> tel     415.407.1357
> fax     415.485.1065
> email:  mm@pinest.org
> web:    www.pinest.org
>          www.pinestreetfoundation.org
> 
> 
> 
> 
> 
> *
> *   For searches and help try:
> *   http://www.stata.com/support/faqs/res/findit.html
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
> 


-----------------------------------------
between 1/2/2006 and 31/3/2006 I will be
visiting the UCLA, during this time the
best way to reach me is by email

Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting adress:
Buitenveldertselaan 3 (Metropolitan), room Z214

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


		
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