[code] # global trimming options -f, --trim_front1 trimming how many bases in front for read1, default is 0 (int [=0]) -t, --trim_tail1 trimming how many bases in tail for read1, default is 0 (int [=0]) -F, --trim_front2 trimming how many bases in front for read2. If it's not specified, it will follow read1's settings (int [=0]) -T, --trim_tail2 trimming how many bases in tail for read2. If it's not specified, it will follow read1's settings (int [=0])[/code][code]官方的说明里边有这么个参数，刚好分别是去除fq1、fq2的头部尾部指定长度的碱基，根据这个试一下看看？ [/code]

代码： ls *fq|while read id;do [b]fastp -A -Q -f 8 -t 80 -l 30[/b] -i $id -o /data/home/zhangfan/NIPT/zfNIPT/fastp/fastp/$id -h /data/home/zhangfan/NIPT/zfNIPT/fastp/fastp/$id.html -j /data/home/zhangfan/NIPT/zfNIPT/fastp/fastp/$id.json;done [attach]64[/attach] [attach]63[/attach] 跑完是这种情况，这个数据不好，reads长度是25-285的