Open in R Source >getwd() This will print the working directory. >setwd("C:/...") This will set the working directory. Set it to the folder where the genbank files live. This will also be the output directory. >miseq_stop_finder(a,b,c,d) a = "genbank_filename" b = "Forward primer sequence" c = "reverse primer sequence" d = "exon number, or any text to include in the output filename. Don't use '.' here, it will confuse the filenaming" Output will be in 'a'_genbank_exon'd'_potential_stops.txt