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# Manhattan plot
GWASout <- read.table(paste(target, ".txt", sep = ""), header = T, colClasses = c("character", rep("numeric",4)))
GWASout$type <- rep("typed", nrow(GWASout))
GWASout$Neg_logP <- -log10(GWASout$p.value)
GWASout <- merge(GWASout, genData$MAP[,c("SNP", "chr", "position")])
GWASout <- GWASout[order(GWASout$Neg_logP, decreasing = T),]
png(paste(target, ".png", sep = ""), height = 500,width = 1000)
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