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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...