Unconfigured Ad

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts
  • ckseq
    Junior Member
    • Feb 2013
    • 4

    ShoRAH

    Hi

    I am new to the forum. I'm a postgrad student in South Africa, and I'm currently working on viral genomics. I'm trying to reconstruct quasispecies using ShoRAH from illumina short read data.

    I'm looking for information about ShoRAH from users but can't seem to find anything anywhere.

    We have an analysis running on short read data (illumina), it's been going for two days now. We just chose random numbers for the parameters and fear that my analysis might take weeks and weeks! Can anyone help me by telling me what the following parameters mean:

    files
    -i <input data file>
    parameters
    -j <sampling iterations>
    -a <alpha>
    -K <startvalue for number of clusters> not compat. with -k
    -k <avg. number of reads in each startcluster> not compat. with -K
    -t <history time>
    -R <randomseed>
    -----------------------------------------------------
    -h this help!

    The analysis is currently running on -j = 100, -t = 1000 and -K = 10. We left out the rest. The input data includes 90 000 reads mapped to a 11kb reference genome.

    What is the signifficance/function of -a (alpha), -K (start value for number of clusters), -k (number of reads per start cluster), -t (history time) and -R (randomseed)? If I knew what these do it might be easier to try and optimise!!

    Note: complete bioinformatics novice but trying

Latest Articles

Collapse

  • SEQadmin2
    From Collection to Sequencing: Why Sample Preparation and Preservation Define Sequencing Data
    by SEQadmin2


    Data variability is still an issue in sequencing technologies despite the advances in reproducibility and accuracy of these platforms. But the problem does not originate in the sequencing itself, but in the previous steps, before the sample reaches the sequencer.


    The first step is collection, followed by preservation and sample preparation for analysis. Most scientists overlook those steps, but not being careful might just be skewing the experiment’s results.
    ...
    06-02-2026, 10:05 AM
  • SEQadmin2
    Single-Cell Sequencing at an Inflection Point: Early Impacts of New Platforms and Emerging Trends
    by SEQadmin2


    With the launch of new single-cell sequencing platforms in 2026, the field stands at an exciting inflection point. This article surveys the most impactful advances in the field and discusses how they’re reshaping research in cancer, immunology, and beyond.


    Introduction

    Single-cell sequencing technologies have undergone remarkable advances over the past decade, transitioning from low-throughput experimental approaches to highly scalable platforms capable of...
    05-22-2026, 06:42 AM
  • SEQadmin2
    Environmental Genomics in the Age of NGS: From Microbes to Conservation Strategies
    by SEQadmin2

    Studying ecosystems means dealing with complex, multi-species communities that are hard to observe at scale. This complexity, however, hides many important questions to be answered, from how biogeochemical cycles work and how climate change can affect species distribution to how conservation strategies can work best.


    Genomics, particularly since the expansion of NGS, has transformed ecosystem ecology. By sequencing environmental DNA, we can now assess biodiversity without direct...
    05-06-2026, 09:04 AM

ad_right_rmr

Collapse

News

Collapse

Topics Statistics Last Post
Started by SEQadmin2, Today, 08:59 AM
0 responses
9 views
0 reactions
Last Post SEQadmin2  
Started by SEQadmin2, 06-02-2026, 12:03 PM
0 responses
21 views
0 reactions
Last Post SEQadmin2  
Started by SEQadmin2, 06-02-2026, 11:40 AM
0 responses
17 views
0 reactions
Last Post SEQadmin2  
Started by SEQadmin2, 05-28-2026, 11:40 AM
0 responses
30 views
0 reactions
Last Post SEQadmin2  
Working...