Cfp1Profiles: Example DBA object used to illustrate usage of the MMDiff...

In MMDiff: Statistical Testing for ChIP-Seq data sets

Description

The object contains a small subset of the CIP-Seq data sets generated to assess the link between the histone modification states of H3K4me3 with respect to the mediator proteins Cfp1 in mouse [1]. The data is available as part of ArrayExpress Experiment E-ERAD-79. For more details see the MMDiffBamSubset data package.

Usage

data(Cfp1Profiles)

Format

A DBA object containing the additional component MD. A DBA object is an S3 object (class "DBA"), which is introduced with the DiffBind package and more information on this class can be found in the Diffbind vignette.

The added field MD is a list containing the following elements:

- RawTotalCounts: matrix of total counts per peak and sample (nPeaks x nSamples)

- PeakRawHists: list of length nPeaks, containing for each Peak a Matrix of histograms (nSamples x nbins). Note, as Peaks can vary in length, nbins may be different for each Peak.

Source

See the MMDiffBamSubset data package for more details.

References

[1] Clouaire T et al (2012). Cfp1 integrates both CpG content and gene activity for accurate H3K4me3 deposition in embryonic stem cells. Genes Dev. August 1, 2012 26: 1714–1728

See Also

dba, summary.DBA

Examples

## Not run: 
  #The object has been generated using the following commands:
  ##### STEP1: create DBA object:
  
  library('MMDiffBamSubset')
  oldwd <- setwd(system.file("extdata", package="MMDiffBamSubset"))
  
  Cfp1 <- dba(sampleSheet="Cfp1.csv", minOverlap=3,
             config = data.frame(RunParallel=FALSE))
  
  ##### STEP2: compute histograms from bam files

  bin.length <- 50
  Peaks <- dba.peakset(Cfp1,bRetrieve=TRUE)
  Peaks <- Peaks[1:1000]
  Cfp1Profiles <- getPeakProfiles(Cfp1,Peaks,bin.length=bin.length,
         save.files=FALSE,run.parallel=FALSE)
  setwd(oldwd)

## End(Not run)

MMDiff documentation built on Oct. 5, 2016, 4:28 a.m.