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Hello all,
I am trying to understand how to extract the first instance of a dataframe record, in which the index may appear any number of times (at least once), into a dataframe which then contains the _first_ record of each index (and subsequent data). The dataframe has mixed data types, and the index for extraction can either be a factor or a character, i.e.,
index data1 data2 data3
char1 ... .... ...
char1
char1
char2
char2
char3
char3
char3
char3
char3
char4
On S-Plus 7.0 Pro, Windows XP Pro
thanks all !!
Michael W. Slattery
Geologist, Ohio EPA
122 S. Front Street
Lazarus Government Center
Columbus OH 43215
michael.slattery@epa.state.oh.us
614-728-1221 (Ph)
614-644-2909 (Fax)
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