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  • lgiloteaux
    Junior Member
    • Aug 2014
    • 4

    Stat summary on reads alignment after bowtie2

    Hi,

    I ran bowtie2 on a sample, after running I got this info on the terminal:

    194885413 reads; of these:
    194885413 (100.00%) were unpaired; of these:
    39117955 (20.07%) aligned 0 times
    103311806 (53.01%) aligned exactly 1 time
    52455652 (26.92%) aligned >1 times
    79.93% overall alignment rate
    [samopen] SAM header is present: 25 sequences.

    I did it on another sample but didn't get a chance to see these stats
    I ran a bamtools stats and samtools flagstat on the alignment.bam file but this is not giving me the number of reads "aligned exactly 1 time" or "aligned >1 times"

    How can I retrieve this info after bowtie ends

    Thanks,

    Ludovic
  • dpryan
    Devon Ryan
    • Jul 2011
    • 3478

    #2
    I've seen people ask this often enough that I just wrote a python script using pysam to do it. It currently only handles single-end reads, but I can change that quite simply.

    Comment

    • lgiloteaux
      Junior Member
      • Aug 2014
      • 4

      #3
      Thanks a lot !

      Comment

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