search for: c000042913

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2010 Sep 17
0
Merging data frames on a variety of columns
...son when I do merges like m3, my resulting data frame is missing columns and I am getting rows that do not appear to match on the variables I have specified, e.g. ... year other_name identifier1 name identifier2 2001 AMDOCS_LTD G0260210 AMDOCS_LTDED C000042913 Help is much appreciated, Chris