library(readxl) Input <- read_excel("/Users/gregg/Downloads/TRACKING_LIST-2022-02-03T20_21_20.674297.xlsx") MacGlovDemux <- subset(Input, select = c("i7 Index","i5 Index", "External Identifier")) names(MacGlovDemux) <- c("forwardmid", "reversemid", "samplename") MacGlovDemux$locus <- "16S" MacGlovDemux$project <- c("LOCAD2") MacGlovDemux$wellposition <- c("") MacGlovDemux$plate <- c("") MacGlovDemux$midplate <- c("") MacGlovDemux$substrate <- c("soil") MacGlovDemux$client_name <- c("mcminn") LocAd2Demux <- subset(MacGlovDemux, select = c(forwardmid, reversemid, locus, samplename, project, wellposition, plate, midplate, substrate, client_name)) write.csv(LocAd2Demux, "/Users/gregg/Downloads/LocAd2_Demux.csv", quote = FALSE, row.names = FALSE)