Re: st: How to identify observations in Using file for further analysis with "nearmrg" command

[hmjc66 <hmjc66@gmail.com>]

Thanks for your suggestion, Rajesh.

I have a more serious issue though. I noticed that -nearmrg- can pick
the closest observation from the Using file multiple times. I require
that it be picked only once.

Is there any way that an observation from the using file will be
picked only once using -nearmrg-? (i.e. after picking an observation,
go to the next closest observation)

Hugh



On 7/2/07, Rajesh Tharyan <R.Tharyan@exeter.ac.uk> wrote:
> Hi,
>
> Try it with option "keep"
>
> If you type help nearmrg you see the syntax definition and description of
> the various options
>
> nearmrg [varlist] using , nearvar(varname) [genmatch(newvarname) lower upper
> roundup keep mergeoptions]
>
> see..
>
>
> mergeoptions :  allows the user to specify any of the standard options for
> merge such as update, _merge(varname),etc.  One difference from the standard
> behavior of merge is that nokeep is the default but can be overridden by the
> keep option.  see help merge
>
> keep: overrides the default behavior (always using the nokeep option of
> merge) and instead includes unmatched  observations from the using dataset.
>
>
>
> Hope this helps
> rajesh
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of hmjc66
> Sent: 02 July 2007 16:49
> To: statalist
> Subject: Re: st: How to identify observations in Using file for further
> analysis with "nearmrg" command
>
> Sorry - there should not be "permno" in the nearmrg command. My
> question still stands.
>
> nearmrg using "C:\Using.dta", nearvar(var1) genmatch(var1bin);
>
> Hugh
>
>
> On 7/2/07, hmjc66 <hmjc66@gmail.com> wrote:
> > Hi,
> >
> > My data is of the following type (see below). I am trying to find the
> > closest match based on var1. I also need to analyze var2-var5 further
> > for ONLY the matched observations in the Using file, but am unable to
> > identify them.
> >
> > For example, lets say observations 7, 9, 11, 14 and 15 from Using file
> > are matched respectively to 1, 2, 3, 4 and 5 from Master file based on
> > var1. I want to only keep observations 7, 9, 11, 14 and 15 from the
> > Using file for further analysis, but cannot identify them. Right now,
> > my Master file contains var1bin after -nearmrg-, and I cannot tell
> > which specific observations in the Using file have been picked. Can
> > you please advise?
> >
> > Currently, my -nearmrg- program is as follows:-
> >
> > nearmrg using "C:\Using.dta", nearvar(var1) genmatch(var1bin);
> >
> > Thanks,
> >
> > Hugh
> >
> >
> > Master
> > id      var1
> > 1
> > 2
> > 3
> > 4
> > 5
> >
> >
> > Using
> > id      var1    var2    var3    var4    var5
> > 6
> > 7
> > 8
> > 9
> > 10
> > 11
> > 12
> > 13
> > 14
> > 15
> > 16
> > 17
> > 18
> > 19
> > 20
> > *
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> >
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