[英]bash: all combinations of lines
我有以下文件(這是分號分隔;真正的文件是制表符分隔的)
abc;173959;172730
def;4186657;4187943
ghi;4703911;4702577
jkl;2243551;2242259
我想將每一行與每一行組合在一起,這樣我的輸出就是:
abc;173959;172730;def;4186657;4187943
abc;173959;172730;ghi;4703911;4702577
abc;173959;172730;jkl;2243551;2242259
def;4186657;4187943;ghi;4703911;4702577
def;4186657;4187943;jkl;2243551;2242259
ghi;4703911;4702577;jkl;2243551;2242259
訂單並不重要。
我提出了以下awk解決方案:
awk '{ a[$0] } END { for (i in a){ for (j in a){if (i != j) print (i "\t" j) } } }' file
但是這會打印出兩個方向的組合,例如
abc;173959;172730;def;4186657;4187943
def;4186657;4187943;abc;173959;172730
因為我對python或perl非常不熟悉,所以我請求使用awk / bash等解決方案。
在awk中:
$ awk '{ a[$0] }
END {
for(i in a) {
delete a[i] # new place for delete
for(j in a)
if(i!=j)
print i ";" j
# delete a[i] # previous and maybe wrong place
}
}' file
def;4186657;4187943;ghi;4703911;4702577
def;4186657;4187943;abc;173959;172730
def;4186657;4187943;jkl;2243551;2242259
ghi;4703911;4702577;abc;173959;172730
ghi;4703911;4702577;jkl;2243551;2242259
abc;173959;172730;jkl;2243551;2242259
不幸的是,訂單是隨機的。
恢復訂單並且不修改a
while處理(參見注釋)的另一種方法是:
$ awk '{ a[NR]=$0 } # index on NR
END {
for(i=1;i<=NR;i++)
for(j=i+1;j<=NR;j++) # j=i+1 is the magic
print a[i] ";" a[j]
}' file
abc;173959;172730;def;4186657;4187943
abc;173959;172730;ghi;4703911;4702577
abc;173959;172730;jkl;2243551;2242259
def;4186657;4187943;ghi;4703911;4702577
def;4186657;4187943;jkl;2243551;2242259
ghi;4703911;4702577;jkl;2243551;2242259
這個awk
應該也可以運行:
awk -F ';' 'NR==FNR{a[++k]=$0; next} {for (i=FNR+1; i<=k; i++) print $0 FS a[i]}' file{,}
abc;173959;172730;def;4186657;4187943
abc;173959;172730;ghi;4703911;4702577
abc;173959;172730;jkl;2243551;2242259
def;4186657;4187943;ghi;4703911;4702577
def;4186657;4187943;jkl;2243551;2242259
ghi;4703911;4702577;jkl;2243551;2242259
你可以試試下面一個,它只給你一個與Input_file的字段值相同的順序,只讀一次Input_file。
awk '{a[FNR]=$0} END{j=1;while(length(a)>=++k){for(q=j+1;q<=FNR;q++){print a[j]";"a[q]}j++};}' Input_file
要么
awk '
{
a[FNR]=$0
}
END{
j=1;
while(length(a)>=++k){
for(q=j+1;q<=FNR;q++){
print a[j]";"a[q]
}
j++
}
}
' Input_file
輸出如下。
abc;173959;172730;def;4186657;4187943
abc;173959;172730;ghi;4703911;4702577
abc;173959;172730;jkl;2243551;2242259
def;4186657;4187943;ghi;4703911;4702577
def;4186657;4187943;jkl;2243551;2242259
ghi;4703911;4702577;jkl;2243551;2242259
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