awk 'BEGIN{OFS="\t"}{if ($2 < $3)print $1,$2,$3,$4,"0","."; else print $1,$3,$2,$4,"0","."} ' mm9.tRNA.bed > newmm9.tRNA.bed
sed'1~2d'file#删除奇数行
sed'1~2!d'file#删除偶数行
awk 'BEGIN{OFS="\t"}{if ($2 < $3)print $1,$2,$3,$4,"0","."; else print $1,$3,$2,$4,"0","."} ' mm9.tRNA.bed > newmm9.tRNA.bed
sed'1~2d'file#删除奇数行
sed'1~2!d'file#删除偶数行
本文标题:2019-05-13 awk if语句
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