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代码
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注释
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FASTQ的质量变体
- sanger: original; ASCII encoding from 33-126, PHRED quality score from 0 to 93
- solexa: Solexa, Inc. (2004), aka Illumina 1.0; ASCII encoding from 59-104, SOLEXA quality score from -5 to 40
- illumina: Illumina 1.3; ASCII encoding from 64-104, PHRED quality score from 0 to 40
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注意
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扩展阅读
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | #!/usr/bin/perl use Bio::SeqIO::fastq; my $in = Bio::SeqIO->new( -format => 'fastq', -variant => 'illumina', #-variant => 'solexa', -file => 'in.fq' ); my $out = Bio::SeqIO->new( -format => 'fastq', -variant => 'sanger', -file => '>out.fq' ); while ( my $seq = $in->next_seq ) { $out->write_seq($seq); } |
第2行——使用Bio::SeqIO::fastq模块;
第5行——指定输入文件的格式为FASTQ;
第6~8行——指定输入文件FASTQ中的质量标准;
第9行——指定输入文件的名称;
第13行——指定输出文件的格式为FASTQ;
第14行——指定输出文件FASTQ中的质量标准;
第15行——指定输出文件的名称;
Variants can be converted back and forth from one another; however, due to the difference in scaling for solexa quality reads, converting from ‘illumina’ or ‘sanger’ FASTQ to solexa is not recommended.