Tutorials

Overview

V-pipe is designed with hierarchically organised data in mind:

samples
├── patient1
│   ├── 20100113
│   └── 20110202
└── patient2
    └── 20081130

Here, we have two samples from patient 1 and one sample from patient 2. All sample names should be unique such later mixups of different timepoints can be avoided.

V-pipe’s parameters for the number of cores to use and the maximum memory is specified in the config file vpipe.config, for instance:

[ngshmmalign]
number_cores = 24
leave_tmp = true

This instructs the ngshmmalign step to use 24 cores and leave the MSA temp files, which might be useful for debugging certain genomic regions.

To invoke V-pipe on the current sample set, first perform a verbose dry-run:

snakemake -n -p -s vpipe.snake

and after confirming that all targets are as you would expect them, perform the real run:

snakemake -s vpipe.snake

Documentation

You can find more ressources about using V-pipe on the project’s wiki.

Installation

See Getting started for instructions regarding initial setup.

Configure options

V-pipe: user configurable options contains a list of options that can be set in V-pipe’s config file vpipe.config.

V-pipe as a benchmark tool

V-pipe also provides an unified benchmarking platform, by incorporating two additional modules: a read simulator and a module to evaluate the accuracy of the results.

Snakemake rules

V-Pipe uses Snakemake, a robust workflow management system, and it is possible for users to easily customize the workflow by adding or excluding rules according to their specific requirements.