Displaying 1 result from an estimated 1 matches for "bar_sa".
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bar_sz
2010 Sep 17
0
Merging data frames on a variety of columns
...identifier1???? identifier2 name other_name year
H34 C56 ACME ACME_LTD 2001
H34 NA ACME ACME_LTD 2002
X20 C40 FOO_CO FOO_CO 2004
NA NA BAR_SA BAR_SAB 2004
NA NA BAR_SA BAR_SAB 2005
As you can see, many observations are missing values.
I have a second data frame with information about these same
companies, in fewer rows, and often with slightly different info...
df2 <-
identifier1...