Question

我有2个TSV文件：

TSV file 1:
    A      B 
  hello   0.5
  bye     0.4

TSV file 2:
 C        D
hello     1
country   5

我想根据file1.A=file2.C

加入2个TSV文件

我如何使用linux中的join函数来完成它？

希望得到这个：

Text     B    D
hello    0.5  1
bye      0.4  
country       5

没有获得任何输出：

join -j 1 <(sort -k1 file1.tsv) <(sort -k1 file2.tsv)

Answer 1

有点毛茸茸，但这是使用awk和关联数组的解决方案。

awk 'FNR == 1 {h[length(h) + 1] = $2}
     FILENAME ~ /test1.tsv/ && FNR > 1 {t1[$1]=$2}
     FILENAME ~ /test2.tsv/ && FNR > 1 {t2[$1]=$2}
     END{print "Text\t"h[1]"\t"h[2];
         for(x in t1){print x"\t"t1[x]"\t"t2[x]}
         for(x in t2){print x"\t"t1[x]"\t"t2[x]}}' test1.tsv test2.tsv | 
  sort | uniq

Answer 2

<强> File1中

$ cat file1
A      B 
hello   0.5
bye     0.4

<强>文件2

$ cat file2
C        D
hello     1
country   5

<强>输出

$ awk 'NR==1{print "Text","B","D"}FNR==1{next}FNR==NR{A[$1]=$2;next}{print $0,(f=$1 in A ? A[$1] : ""; if(f)delete A[$1]}END{for(i in A)print i,"",A[i]}' OFS='\t' file2 file1
Text    B   D
hello   0.5 1
bye     0.4 
country     5

更好的可读版本

awk '
     # Print header when NR = 1, this happens only when awk reads first file
     NR==1{print "Text","B","D"}

     # Number of Records relative to the current input file. 
     # When awk reads from the multiple input file, 
     # awk NR variable will give the total number of records relative to all the input file. 
     # Awk FNR will give you number of records for each input file
     # So when awk reads first line, stop processing and go to next line
     # this is just to skip header from each input file
     FNR==1{
             next
           }

     # FNR==NR is only true while reading first file (file2)
     FNR==NR{
              # Build assicioative array on the first column of the file
              # where array element is second column
              A[$1]=$2

              # Skip all proceeding blocks and process next line
              next 
            }
           {
              # Check index ($1 = column1) from second argument (file1) exists in array A 
              # if exists variable f will be 1 (true) otherwise 0 (false)
              # As long as above state is true
              # print current line and element of array A where index is column1
              print $0,( f=$1 in A ? A[$1] : "" )

              # Delete array element corresponding to index $1, if f is true
              if(f)delete A[$1]
            }

         # Finally in END block print array elements one by one,
         # from file2 which does not exists in file1
         END{
               for(i in A)
                   print i,"",A[i]
            }
    ' OFS='\t' file2 file1

使用内部联接加入两个TSV文件

2 个答案: