awk split and concatenate在一行输出中有多余的空间

Question

下面的awk生成所有行均已split的current output 。 但是第一行似乎有空格，我似乎无法弄清楚为什么。 不知道这是否是最好的方法，但是会产生接近正确的输出。 谢谢 ：）。

awk

awk '{split($6,a,":"); print $1":",$2,$3,a[1],a[2],a[6],a[7]} {split($7,a,":"); print $1":"$2,$3,a[1],a[2],a[6],a[7]} {split($8,a,":"); print $1":"$2,$3,a[1],a[2],a[6],a[7]} {split($9,a,":"); print $1":"$2,$3,a[1],a[2],a[6],a[7]} {split($10,a,":"); print $1":"$2,$3,a[1],a[2],a[6],a[7]}' input > parse

输入文件 （制表符分隔）

chr1    13408   C   1   =:0:0.00:0.00:0.00:0:0:0.00:0.00:0.00:0:0.00:0.00:0.00  A:0:0.00:0.00:0.00:0:0:0.00:0.00:0.00:0:0.00:0.00:0.00  C:1:2.00:28.00:2.00:0:1:0.00:0.02:0.00:0:0.00:0.00:0.00 G:0:0.00:0.00:0.00:0:0:0.00:0.00:0.00:0:0.00:0.00:0.00  T:0:0.00:0.00:0.00:0:0:0.00:0.00:0.00:0:0.00:0.00:0.00  N:0:0.00:0.00:0.00:0:0:0.00:0.00:0.00:0:0.00:0.00:0.00

当前输出（解析）

chr1: 13408 C A 0 0 0 (has a space between `chr1:` and `13408`)
chr1:13408 C C 1 0 1
chr1:13408 C G 0 0 0
chr1:13408 C T 0 0 0
chr1:13408 C N 0 0 0

期望的输出

chr1:13408 C A 0 0 0 (has no space between `chr1:` and `13408`)
chr1:13408 C C 1 0 1
chr1:13408 C G 0 0 0
chr1:13408 C T 0 0 0
chr1:13408 C N 0 0 0

Answer 1

特殊照顾告诉awk将打印空间第一,在你的第一个print语句。 更改

print $1":",$2

至

print $1":"$2

就像您已经在第二个打印语句中这样，因此不会在:和$2之间获得OFS值（默认为空格）。