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From |
Austin Nichols <austinnichols@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: compare files, vars only |

Date |
Thu, 19 Feb 2009 11:41:53 -0500 |

David Kantor <kantor.d@att.net>: 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 <austinnichols@gmail.com> wrote: > David Kantor <kantor.d@att.net>: > 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 <kantor.d@att.net> 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 > * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: compare files, vars only***From:*David Kantor <kantor.d@att.net>

**Re: st: compare files, vars only***From:*Austin Nichols <austinnichols@gmail.com>

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