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df=read.csv("19en.csv", header=T, row.names=1)head(df)data.pca <- prcomp...
ggplot(data = df, mapping = aes(x=year, y=value,linetype=type, colour=ty...
下載參考基因組wget https://ftp.ncbi.nih.gov/genomes/all/GCA/000/001/405/GCA_000...