Unconfigured Ad

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts
  • Gen2007
    Member
    • Jun 2010
    • 10

    samtools view without header

    Hi All,

    I'm having trouble filtered MAQ aligned reads from a sam file with no header and converting to BAM. I've tried created the fai file of the reference as suggested by the SAMTOOLS faq, but to no avail.

    When I use the following command:
    samtools view -S lane1.normal.sam -T reduced.reference.fa -q 1

    I get an error: "Parse error at line 1: missing colon in auxiliary data"

    Does anyone have any suggestions?

    Thanks a lot!
  • asangqi
    Junior Member
    • Feb 2011
    • 4

    #2
    you can use samtools view -S xx.sam -t chr.list -q 1 > xx.bam.

    Comment

    • Gen2007
      Member
      • Jun 2010
      • 10

      #3
      i implemented the command you suggested, asanggi:

      samtools view -S xx.sam -t reference.fa.fai -q 1 > xx.bam

      but i still get the same error.

      thanks for your help!
      Last edited by Gen2007; 02-24-2011, 09:16 AM.

      Comment

      • tmanke
        Member
        • Oct 2009
        • 26

        #4
        Perhaps there is a problem with trailing tabs?
        I solved a similar problem using

        sed 's/[ \t]*$//g' samfile

        Thomas

        Comment

        • tanakky
          Junior Member
          • Nov 2011
          • 1

          #5
          I had the same problem, but I could solve with two following command

          sed 's/[ \t]*$//g' samfile (same with Thomas)
          tr -d \\r < samfile > samfile.2

          Thanks
          Yoshiaki

          Comment

          Latest Articles

          Collapse

          • SEQadmin2
            Advanced Sequencing Platforms Tackle Neuroscience’s Toughest Genomics Problems
            by SEQadmin2



            Genomics studies in neuroscience face a special challenge due to the brain’s complexity and scarcity of samples. Mapping changes in cell type and state using conventional next-generation sequencing methods remains challenging. Advances in technologies like single-cell sequencing, spatial transcriptomics, and long-read sequencing have opened the door to deeper studies of the brain and diseases like Alzheimer’s, amyotrophic lateral sclerosis (ALS), and schizophrenia.
            ...
            07-09-2026, 11:10 AM
          • SEQadmin2
            Cancer Drug Resistance: The Lingering Barrier to Rising Survival
            by SEQadmin2



            Cancer survival rates have significantly increased in the last few decades in the United States, reaching a combined 70% 5-year survival rate by 2021. Behind this number, there are years of research to find new therapies, drug targets, and early detection methods. But there is one core challenge that keeps slowing down these advances, and it’s about drug resistance.

            There is no single reason why many patients don’t respond to treatment as expected. Cancer is...
            07-08-2026, 05:17 AM
          • GATTACAT
            Reply to Nine Things a Sample Prep Scientist Thinks About Before Sequencing
            by GATTACAT
            Love this - good data definitely starts from good input, and poor input can only give relatively poor data. I particularly like the mention of Nanodrop/absorbance based methods for quantification. It's such a toss up if you'll get an accurate reading or what amounts to a randomly generated number, and a lot of library/sequencing related issues can be traced back to poor quant.
            07-01-2026, 11:43 AM

          ad_right_rmr

          Collapse

          News

          Collapse

          Topics Statistics Last Post
          Started by SEQadmin2, Yesterday, 10:26 AM
          0 responses
          11 views
          0 reactions
          Last Post SEQadmin2  
          Started by SEQadmin2, 07-09-2026, 10:04 AM
          0 responses
          25 views
          0 reactions
          Last Post SEQadmin2  
          Started by SEQadmin2, 07-08-2026, 10:08 AM
          0 responses
          16 views
          0 reactions
          Last Post SEQadmin2  
          Started by SEQadmin2, 07-07-2026, 11:05 AM
          0 responses
          33 views
          0 reactions
          Last Post SEQadmin2  
          Working...