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  • From bam to wig format

    Hello,

    I have bam files and I need to convert it to wig format to be like this:

    variableStep chrom=chr2
    300701 12.5
    300702 12.5
    300703 12.5
    300704 12.5
    300705 12.5

    I know that there is an options in samtools called: pileup or mpileup, but it doesn't work well with me for the following reason:
    if only some nucleotides of a read is mapped to a genome, it reports coverage equally to all nucleotides of that read. I need to report only coverage for mapped nucleotides within the read, do u know any other tool that make this?

    Thanks,

  • #2
    Try some thing like this:
    samtools depth yourfile.bam | awk '{if ($1!=prev)print "variableStep chrom="$1;print $2"\t"$3;prev=$1}


    example :
    samtools depth TCGA-23-1110-01A-01W-0486-08_IlluminaGA-DNASeq_capture.bam | awk '{if ($1!=prev)print "variableStep chrom="$1;print $2"\t"$3;prev=$1}' |head
    variableStep chrom=chrM
    22 1
    23 1
    24 1
    25 1
    26 1
    27 1
    28 1
    29 2
    30 3

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