Question

我大约有100个八列的逗号分隔文本文件。

两个文件名的示例：

sample1_sorted_count_clean.csv 
sample2_sorted_count_clean.csv

文件内容示例：

Domain,Phylum,Class,Order,Family,Genus,Species,Count
Bacteria,Proteobacteria,Alphaproteobacteria,Sphingomonadales,Sphingomonadaceae,Zymomonas,Zymomonas mobilis,0.0
Bacteria,Bacteroidetes,Flavobacteria,Flavobacteriales,Flavobacteriaceae,Zunongwangia,Zunongwangia profunda,0.0

对于每个文件，我想用样本ID替换列标题“ Count”，该ID包含在文件名的第一部分（sample1，sample2）

最后，标头应如下所示：

Domain,Phylum,Class,Order,Family,Genus,Species,sample1

如果我使用我的代码，则标题如下：

Domain,Phylum,Class,Order,Family,Genus,Species,${f%_clean.csv}

for f in *_clean.csv; do echo ${f}; sed -e "1s/Domain,Phylum,Class,Order,Family,Genus,Species,RPMM/Domain,Phylum,Class,Order,Family,Genus,Species,${f%_clean.csv}/" ${f} > ${f%_clean.csv}_clean2.csv; done

我也尝试过：

for f in *_clean.csv; do gawk -F"," '{$NF=","FILENAME}1' ${f}  > t && mv t ${f%_clean.csv}_clean2.csv; done

在这种情况下，“ count”将替换为整个文件名，但是该列的每一行现在都包含文件名。计数值不再存在。这不是我想要的。

您对我还可以尝试的方法有任何想法吗？提前非常感谢您！

安娜

Answer 1

如果您对awk表示满意，请尝试以下。

awk 'BEGIN{FS=OFS=","} FNR==1{var=FILENAME;sub(/_.*/,"",var);$NF=var} 1' *.csv

编辑： ：由于OP要求在第二个下划线之后删除文件名中的所有内容，然后尝试执行以下操作。

awk 'BEGIN{FS=OFS=","} FNR==1{split(FILENAME,array,"_");$NF=array[1]"_"array[2]} 1' *.csv

说明： 在此处添加上述代码的说明。

awk '                              ##Starting awk program from here.
BEGIN{                             ##Starting BEGIN section of code from here, which will be executed before Input_file(s) are being read.
  FS=OFS=","                       ##Setting FS and OFS as comma here for all files all lines.
}                                  ##Closing BEGIN section here.
FNR==1{                            ##Checking condition if FNR==1 which means very first line is being read for Input_file then do following.
  split(FILENAME,array,"_")        ##Using split of awk out of box function by splitting FILENAME(which contains file name in it) into an array named array with delimiter _ here.
  $NF=array[1]"_"array[2]          ##Setting last field value to array 1st element underscore and then array 2nd element value in it.
}                                  ##Closing FNR==1 condition BLOCK here.
1                                  ##Mentioning 1 will print the rest of the lines for current Input_file.
' *.csv                            ##Passing all *.csv files to awk program here.

用文件名替换一列的标题

1 个答案: