Question

我有这个文件。

House.csv
M2018&03,HOUSE,BOX_X,16
M2018&03,HOUSE,FENCE_A,2
M2018&03,HOUSE,IRON_V + WINDOWS,1
M2018&03,HOUSE,DOOR + ROOF,7
M2018&03,HOUSE,TABLE + TV + LAPTOP,1
M2018&03,HOUSE,RADIO_A + RADIO_B + RADIO_C,3
M2018&03,HOUSE,CHAIR_A + CHAIR_B,2

我正在使用AWK更改文件并添加行号本身。

awk -F"," '{ gsub(/\_/,"\&",$1); if(NR < 10){print $1","$2",0"NR","$3","$4}else{print $1","$2","NR","$3","$4}}' House.csv > House2.csv

House2.csv
M2018_03,HOUSE,01,BOX_X,16
M2018_03,HOUSE,02,FENCE_A,2
M2018_03,HOUSE,03,IRON_V + WINDOWS,1
M2018_03,HOUSE,04,DOOR + ROOF,7
M2018_03,HOUSE,05,TABLE + TV + LAPTOP,1
M2018_03,HOUSE,06,RADIO_A + RADIO_B + RADIO_C,3
M2018_03,HOUSE,07,CHAIR_A + CHAIR_B,2

现在我想要把这个awk放在以前的awk中。

awk 'BEGIN{FS=OFS=","}{a[$1","$2]+=$5}END{ for (i in a) print i,a[i]}' House2.csv

请注意，我想要第5列中所有值的总和。 M2018_03，HOUSE，32

成为这样的文件。

M2018_03,HOUSE,01,BOX_X,16,32
M2018_03,HOUSE,02,FENCE_A,2,32
M2018_03,HOUSE,03,IRON_V + WINDOWS,1,32
M2018_03,HOUSE,04,DOOR + ROOF,7,32
M2018_03,HOUSE,05,TABLE + TV + LAPTOP,1,32
M2018_03,HOUSE,06,RADIO_A + RADIO_B + RADIO_C,3,32
M2018_03,HOUSE,07,CHAIR_A + CHAIR_B,2,32

Answer 1

您无需多次调用awk：

awk -F, -v OFS=, '
    NR == FNR {sum[$1,$2] += $NF; next} 
    {
        $NF = $NF OFS sum[$1,$2]
        gsub(/&/, "_", $1)
        $2 = $2 OFS sprintf("%02d", FNR)
        print
    }
' House.csv House.csv

循环文件两次：首先计算总和，第二次将所有修改应用于该行。

输出

M2018_03,HOUSE,01,BOX_X,16,32
etc

Answer 2

编辑： 添加解决方案，可以节省使用多个awk的OP。

awk -F, 'FNR==NR{sum[$1]+=$NF;next} {val=$1;sub("&","_",val);$3=sprintf("%02d",FNR) OFS $3;print $0,sum[$1]}' OFS=, house.csv  house.csv

以下内容对您有帮助。

awk -F, 'FNR==NR{sum[$1]+=$NF;next} {print $0,sum[$1]}' OFS=, house.csv  house.csv

说明：现在也添加上述代码的说明。

awk -F, '                    ##Making field separator as comma here.
FNR==NR{                     ##Checking condition FNR==NR which will be TRUE when first time house.csv will be read.
   sum[$1]+=$NF;             ##Creating an array named sum whose index is first field and value is last field and adding its value to same index items.
   next}                     ##next will skip all further statements now.
{                            ##This block will be executed when 2nd time house.csv is getting executed.
   print $0,sum[$1]          ##Printing current line along with array sum value whose index is current line first field.
}
' OFS=, house.csv  house.csv ##Setting OFS as comma and mentioning Input_file 2 times here.

使用if

2 个答案: