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Re: st: compare files, vars only
David Kantor <[email protected]>:
These programs could both use a
preserve
clear
at the beginning, so it doesn't matter what data is in memory.
On Thu, Feb 19, 2009 at 11:20 AM, Austin Nichols
<[email protected]> wrote:
> David Kantor <[email protected]>:
> No, but see -vlc- on SSC.
> To compare sets of variables, you could just
>
> prog cvar, rclass
> qui use in 1 using `"`1'"'
> unab f: _all
> qui use in 1 using `"`2"'
> unab g: _all
> loc i: list f & g
> di as txt `"In `1'"' _n as res "`f'"
> di as txt `"In `2'"' _n as res "`g'"
> di as txt "In both" _n as res "`i'"
> if "`i'"=="" di as err "No variables in common"
> return local file1 `"`1'"'
> return local vars1 `f'
> return local file2 `"`2'"'
> return local vars2 `g'
> return local both `i'
> end
> cvar "`c(sysdir_base)'n/nlsw88" "`c(sysdir_base)'a/auto"
>
> Or did you want to compare an arbitrary number of files? Also easy
> with -mac shift- :
>
> prog cvars, rclass
> loc n=1
> while `"`1'"'!="" {
> qui use in 1 using `"`1'"'
> unab f`n': _all
> di as txt `"In `1'"' _n as res "`f`n''"
> return local file`n' `"`1'"'
> return local vars`n' `f`n''
> if `n'==2 loc f: list f1 & f2
> else loc f: list f & f`n'
> loc n=`n'+1
> mac sh
> }
> di as txt "In all files" _n as res "`f'"
> if "`i'"=="" di as err "No variables in common"
> return local all "`f'"
> end
> cvars "`c(sysdir_base)'n/nlsw88" "`c(sysdir_base)'a/auto"
> "`c(sysdir_base)'a/auto"
>
> On Thu, Feb 19, 2009 at 10:41 AM, David Kantor <[email protected]> wrote:
>> Hi.
>> Does anyone know of a program to compare the sets of variables in two data
>> files? What I have in mind is something akin to -cf-, but...
>> it would not compare values -- only the names of variables;
>> it would not care whether the two data files had the same number of
>> observations.
>>
>> I was planning to write such a program, but I wanted to be sure that it
>> hadn't already been done.
>> Thanks
>> --David
>
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