使用awk將'n列'csv數據集轉換爲'（n-1）列'數據集

Question

我有一個將圖數據集更改爲事務數據集的數據轉換問題。我應該使用AWK還是使用不同的語言？

使用第一行標題和期望的輸出示例csv輸入。

input.csv

TO, FROM, WEIGHT 
Bob Jones, Tom P. Fisher, 1 
Adam Left, Bob Jones, 3 

output.csv

ID, TARGET 
1, Bob Jones 
1, Tom P. Fisher 
2, Adam Left 
2, Bob Jones 
3, Adam Left 
3, Bob Jones 
4, Adam Left 
4, Bob Jones 

Answer 1

另在AWK：

$ awk ' 
BEGIN { 
    FS=OFS=", "     # set delimiters 
    print "ID", "TARGET"  # output header 
} 
$NF~/[0-9]+/ {     # process records which end in a value 
    for(i=1;i<=$NF;i++) {  # loop $NF many times 
     c++      # counter 
     for(j=1;j<NF;j++)  # for each name 
      print c, $j   # print count and name 
    } 
}' file 
ID, TARGET 
1, Bob Jones 
1, Tom P. Fisher 
2, Adam Left 
2, Bob Jones 
3, Adam Left 
3, Bob Jones 
4, Adam Left 
4, Bob Jones 

Answer 2

哪裏ad.data爲您的數據文件和ad.csv是你的輸出文件。

awk 'BEGIN {FS=OFS=","} {print $3, $1\n$2, $1}' ad.data>ad.csv 

Answer 3

AWK溶液：

awk -F',[[:space:]]*' 'BEGIN{ print "ID, TARGET" }NR>1{ id_cnt+=$3; id=(NR==2)? 1 : id_cnt-$3; 
    for(i=id;i<=id_cnt;i++) printf("%d, %s\n%d, %s\n",i,$1,i,$2) }' file 

輸出：

ID, TARGET 
1, Bob Jones 
1, Tom P. Fisher 
1, Adam Left 
1, Bob Jones 
2, Adam Left 
2, Bob Jones 
3, Adam Left 
3, Bob Jones 
4, Adam Left 
4, Bob Jones