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2013 Mar 13
2
Extract letters from a column
Dear list: I would like to extract three letters from first and second elements in one column and make a new column. For example below, > tempdf = read.table("clipboard", header=T, sep='\t') > tempdf name var1 var2 abb 1 Tom Cruiser 1 6 TomCru 2 Bread Pett 2 5 BrePet 3 Arnold Schwiezer 3 7 ArnSch > (p1 = substr(tempdf$name, 1, 3)) [1] "Tom" "Bre" "Arn" I was able to extract three letters from first name, however, I don't know how to extract three letters from last name (i.e., 'C...