第一列顺序不变对第二列进行排序

source data:

Ph_scaffold57_2 6002125
Ph_scaffold57_2 1826520
Ph_scaffold4    54818110
Ph_scaffold4    53507591
Ph_scaffold4    51550443
Ph_scaffold4    15513112
Ph_scaffold243  767655

 

script:

#!/bin/awk -f
# 
# usage: ./script  source_data <(echo)
# <(echo) 使用子shell添加一空行，对最后一行进行模式匹配
NR>1 && i!=$1 {
  for(j=0;j++<asorti(a,b);)
    print i,b[j]
  delete a
} 
{
  i=$1
  a[$2]
}

 

result:

Ph_scaffold57_2 6002125
Ph_scaffold57_2 1826520
Ph_scaffold4    54818110
Ph_scaffold4    53507591
Ph_scaffold4    51550443
Ph_scaffold4    15513112
Ph_scaffold243  767655