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Signac

Overview

Signac is a comprehensive R package for the analysis of single-cell chromatin data. Signac includes functions for quality control, normalization, dimension reduction, clustering, differential activity, and more.

Documentation and tutorials can be found at https://satijalab.org/signac/

Installation

Signac requires that Bioconductor is installed:

if (!requireNamespace("BiocManager", quietly = TRUE))
    install.packages("BiocManager")
BiocManager::install()
setRepositories(ind=1:2)

To install the latest release of Signac from CRAN:

install.packages("Signac")

To release the latest develop version from GitHub:

if (!requireNamespace("remotes", quietly = TRUE))
    install.packages("remotes")
remotes::install_github("timoast/signac", ref = "develop")

Release notes

For a changelog please see the NEWS file, also available on the Signac website.

Getting help

If you encounter a bug or have a feature request, please open an issue.

If you would like to discuss questions related to single-cell analysis, you can open a discussion.

Citing Signac

If you use the Signac package in your work please cite Stuart et al. 2020

@UNPUBLISHED{signac,
  title    = "Multimodal single-cell chromatin analysis with Signac",
  author   = "Stuart, Tim and Srivastava, Avi and Lareau, Caleb and Satija,
              Rahul",
  journal  = "bioRxiv",
  pages    = "2020.11.09.373613",
  month    =  nov,
  year     =  2020,
  url      = "https://www.biorxiv.org/content/10.1101/2020.11.09.373613v1",
  language = "en"
}

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Version

Install

install.packages('Signac')

Monthly Downloads

5,446

Version

1.4.0

License

MIT + file LICENSE

Issues

Pull Requests

Stars

Forks

Maintainer

Tim Stuart

Last Published

September 22nd, 2021

Functions in Signac (1.4.0)

ChromatinAssay-class

The ChromatinAssay class
ConnectionsToLinks

Cicero connections to links
FindMotifs

FindMotifs
ConvertMotifID

Convert between motif name and motif ID
FindTopFeatures

Find most frequently observed features
CreateMotifMatrix

Create motif matrix
Footprint

Transcription factor footprinting analysis
FractionCountsInRegion

Fraction of counts in a genomic region
CreateMotifObject

Create motif object
GetFootprintData

Get footprinting data
GetCellsInRegion

Get cells in a region
ClosestFeature

Closest Feature
CoveragePlot

Plot Tn5 insertion frequency over a region
ExpressionPlot

Plot gene expression
CoverageBrowser

Genome browser
ClusterClonotypes

Find relationships between clonotypes
PlotFootprint

Plot motif footprinting results
IntersectMatrix

Intersect genomic coordinates with matrix rows
InsertionBias

Compute Tn5 insertion bias
PeakPlot

Plot peaks in a genomic region
DepthCor

Plot sequencing depth correlation
CombineTracks

Combine genome region plots
Extend

Extend
SetMotifData

Set motif data
RunTFIDF

Compute the term-frequency inverse-document-frequency
UnifyPeaks

Unify genomic ranges
CreateFragmentObject

Create a Fragment object
Cells<-

Set and get cell barcode information for a Fragment object
CreateChromatinAssay

Create ChromatinAssay object
CallPeaks

Call peaks
RegionStats

Compute base composition information for genomic ranges
ValidateCells

Validate cells present in fragment file
ReadMGATK

Read MGATK output
Fragment-class

The Fragment class
DownsampleFeatures

Downsample Features
Fragments

Get the Fragment objects
FragmentHistogram

Plot fragment length histogram
GetMotifData

Retrieve a motif matrix
Motifs

Get or set a motif information
GetLinkedPeaks

Get peaks linked to genes
TSSPlot

Plot signal enrichment around TSSs
coverage,ChromatinAssay-method

Coverage of a ChromatinAssay object
NucleosomeSignal

NucleosomeSignal
findOverlaps-methods

Find overlapping ranges for ChromatinAssay objects
TilePlot

Plot integration sites per cell
Cells.Fragment

Annotation

Annotation
ValidateFragments

Validate Fragment object
CountFragments

Count fragments
CellsPerGroup

Cells per group
UpdatePath

Update the file path for a Fragment object
GetIntersectingFeatures

Find intersecting regions between two objects
FRiP

Calculate fraction of reads in peaks per cell
GeneActivity

Create gene activity matrix
GenomeBinMatrix

Genome bin matrix
FeatureMatrix

Feature Matrix
GetLinkedGenes

Get genes linked to peaks
CountsInRegion

Counts in region
FindClonotypes

Find clonotypes
FilterCells

Filter cells from fragment file
blacklist_ce10

Genomic blacklist regions for C. elegans ce10 (0-based)
blacklist_hg19

Genomic blacklist regions for Human hg19 (0-based)
LinkPlot

Plot linked genomic elements
LinkPeaks

Link peaks to genes
Jaccard

Calculate the Jaccard index between two matrices
GRangesToString

GRanges to String
RunSVD

Run singular value decomposition
RunChromVAR

Run chromVAR
Links

Get or set links information
ValidateHash

Validate hashes for Fragment object
VariantPlot

Plot strand concordance vs. VMR
GetFragmentData

Get Fragment object data
blacklist_hg38

Genomic blacklist regions for Human GRCh38
GetTSSPositions

Find transcriptional start sites
IdentifyVariants

Identify mitochondrial variants
GetGRangesFromEnsDb

Extract genomic ranges from EnsDb object
inter-range-methods

Inter-range transformations for ChromatinAssay objects
nearest-methods

Find the nearest range neighbors for ChromatinAssay objects
blacklist_ce11

Genomic blacklist regions for C. elegans ce11 (0-based)
theme_browser

Genome browser theme
subset.Motif

Subset a Motif object
Motif-class

The Motif class
MotifPlot

Plot DNA sequence motif
MatchRegionStats

Match DNA sequence characteristics
LookupGeneCoords

Get gene coordinates
SubsetMatrix

Subset matrix rows and columns
TSSEnrichment

Compute TSS enrichment score per cell
blacklist_dm3

Genomic blacklist regions for Drosophila dm3 (0-based)
seqinfo-methods

Access and modify sequence information for ChromatinAssay objects
reexports

Objects exported from other packages
blacklist_dm6

Genomic blacklist regions for Drosophila dm6 (0-based)
SplitFragments

Split fragment file by cell identities
StringToGRanges

String to GRanges
as.ChromatinAssay

Convert objects to a ChromatinAssay
atac_small

A small example scATAC-seq dataset
blacklist_mm10

Genomic blacklist regions for Mouse mm10 (0-based)
granges-methods

Access genomic ranges for ChromatinAssay objects
blacklist_hg38_unified

Unified genomic blacklist regions for Human GRCh38
head.Fragment

Return the first rows of a fragment file
AddChromatinModule

Add chromatin module
AlleleFreq

Compute allele frequencies per cell
AddMotifs

Add DNA sequence motif information
BinarizeCounts

Binarize counts
BigwigTrack

Plot data from BigWig
AnnotationPlot

Plot gene annotations
AccessiblePeaks

Accessible peaks
AverageCounts

Average Counts
AggregateTiles

Quantify aggregated genome tiles