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2010 Sep 17
0
Merging data frames on a variety of columns
Hello,
This is a semi-complicated question about comparing two datasets,
probably using merge, but I am open to other ideas. I have a large
frame of information about companies.? It's over 30,000 rows and looks
something like...
df1 <-
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...
2010 Sep 14
1
Reading highest numbered file
I have a bunch of files named
"[identifier1].[identifier2].[yyyymmdd].[hhmmss].txt" and im having
trouble updating my read script for the timestamp.
I've been using file.exists and a for loop but its highly inefficient
and cumbersome.
Would there be someway to create an object containing the string of
each .txt file in some direct...