现在要将多个lane 的fastq.gz合并,方便下步骤的分析。
cat HG251H_S11_L001_R1_001.fastq.gz HG251H_S11_L002_R1_001.fastq.gz HG251H_S11_L003_R1_001.fastq.gz HG251H_S11_L004_R1_001.fastq.gz >cat.fastq.gz
zcat HG251H_S11_L001_R1_001.fastq.gz HG251H_S11_L002_R1_001.fastq.gz HG251H_S11_L003_R1_001.fastq.gz HG251H_S11_L004_R1_001.fastq.gz >zcat1.fastq
gzip zcat1.fastq
结果分析:
[xmxjy@localhost fq]$ ll cat.fastq.gz zcat1.fastq.gz
-rw-rw-r-- 1 xmxjy xmxjy 215021321 Jan 10 01:34 cat.fastq.gz
-rw-rw-r-- 1 xmxjy xmxjy 198342024 Jan 10 01:36 zcat1.fastq.gz
不一样什么原因,压缩率不同吗?解压看看
gzip -cd cat.fastq.gz >cat.fastq
gzip -cd zcat1.fastq.gz > zcat1.fastq
[xmxjy@localhost fq]$ ll cat.fastq zcat1.fastq
-rw-rw-r-- 1 xmxjy xmxjy 802476157 Jan 10 01:41 cat.fastq
-rw-rw-r-- 1 xmxjy xmxjy 802476157 Jan 10 01:41 zcat1.fastq
[xmxjy@localhost fq]$ cat cat.fastq |wc
8785932 10982415 802476157
[xmxjy@localhost fq]$ wc zcat1.fastq
8785932 10982415 802476157 zcat1.fastq
[xmxjy@localhost fq]$ md5sum cat.fastq
8ce225df8b6b54046edee7986fc826ea cat.fastq
[xmxjy@localhost fq]$ md5sum zcat1.fastq
8ce225df8b6b54046edee7986fc826ea zcat1.fastq
OK,没问题了,用cat吧,因为快。