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help for ^fndmtch^
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Find matching values
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    ^fndmtch^ varname [ ^if^ exp ] [ ^in^ range ] ^, s^earch^(^searchvarlist^)^ 
    [ ^l^ist ^g^enerate^(^newvar^)^ ] 

Description
-----------

^fndmtch^ finds observations in which the value of varname matches (equals)
the value(s) of one or more variables in searchvarlist.


Remarks
-------

Missing values are not excluded from comparisons by default. 


Options
-------

^search(^searchvarlist^)^ specifies variables to be searched for 
    matching values. If varname is numeric (string), searchvarlist 
    should all be numeric (string): however, inappropriate variables
    are trapped with a warning. This is a required option. 

    ^search(_all)^ is a brute force way of searching all variables 
    for matches. ^fndmtch^ automatically ignores the match between 
    varname and itself as one of ^_all^.      

^list^ specifies that matching observations and variables should be 
    listed.

^generate(^newvar^)^ specifies a new variable to hold the number of 
    matches. This new variable contains only integers in the range from 0
    to the number of variables in searchvarlist. After ^generate(^newvar^)^ 
    Stata_command ^if^ newvar selects observations with matching values. 


Saved results
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^r(where)^   names of variables with matching values


Examples
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    . ^fndmtch year, s(a b c)^ 
    
    . ^fndmtch year, s(_all) gen(nmatch)^ 
    . ^list year `r(where)' if nmatch^ 


Authors
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         Nicholas J. Cox, University of Durham, U.K.
         n.j.cox@@durham.ac.uk

         Desmond E. Williams, NIDDK/NIH, Phoenix, Arizona, U.S.A.
         demw@@mail.nih.gov


See also
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 On-line: @dups@ (if installed)