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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. 2021

@ARTICLE{signac,
  title     = "Single-cell chromatin state analysis with Signac",
  author    = "Stuart, Tim and Srivastava, Avi and Madad, Shaista and Lareau,
               Caleb A and Satija, Rahul",
  journal   = "Nat. Methods",
  publisher = "Nature Publishing Group",
  pages     = "1--9",
  month     =  nov,
  year      =  2021,
  url       = "https://www.nature.com/articles/s41592-021-01282-5",
  language  = "en"
}

Related packages

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Version

Install

install.packages('Signac')

Monthly Downloads

5,446

Version

1.6.0

License

MIT + file LICENSE

Issues

Pull Requests

Stars

Forks

Maintainer

Tim Stuart

Last Published

March 5th, 2022

Functions in Signac (1.6.0)

AverageCounts

Average Counts
AddChromatinModule

Add chromatin module
AggregateTiles

Quantify aggregated genome tiles
Annotation

Annotation
AlleleFreq

Compute allele frequencies per cell
BinarizeCounts

Binarize counts
AddMotifs

Add DNA sequence motif information
AccessiblePeaks

Accessible peaks
AnnotationPlot

Plot gene annotations
BigwigTrack

Plot data from BigWig
CallPeaks

Call peaks
CreateChromatinAssay

Create ChromatinAssay object
CreateFragmentObject

Create a Fragment object
Cells<-

Set and get cell barcode information for a Fragment object
ConnectionsToLinks

Cicero connections to links
CoveragePlot

Plot Tn5 insertion frequency over a region
FRiP

Calculate fraction of reads in peaks per cell
FeatureMatrix

Feature Matrix
CoverageBrowser

Genome browser
ConvertMotifID

Convert between motif name and motif ID
CreateMotifObject

Create motif object
CreateMotifMatrix

Create motif matrix
Footprint

Transcription factor footprinting analysis
GetFragmentData

Get Fragment object data
GetGRangesFromEnsDb

Extract genomic ranges from EnsDb object
NucleosomeSignal

NucleosomeSignal
ClosestFeature

Closest Feature
ChromatinAssay-class

The ChromatinAssay class
FindMotifs

FindMotifs
ClusterClonotypes

Find relationships between clonotypes
GetIntersectingFeatures

Find intersecting regions between two objects
GetFootprintData

Get footprinting data
FractionCountsInRegion

Fraction of counts in a genomic region
GetCellsInRegion

Get cells in a region
Cells.Fragment

PeakPlot

Plot peaks in a genomic region
GetLinkedGenes

Get genes linked to peaks
CellsPerGroup

Cells per group
RegionPlot

Region plot
CountFragments

Count fragments
RegionHeatmap

Region heatmap
InsertionBias

Compute Tn5 insertion bias
RegionStats

Compute base composition information for genomic ranges
UpdatePath

Update the file path for a Fragment object
RegionMatrix

Region enrichment analysis
CountsInRegion

Counts in region
TilePlot

Plot integration sites per cell
FindTopFeatures

Find most frequently observed features
FilterCells

Filter cells from fragment file
UnifyPeaks

Unify genomic ranges
IntersectMatrix

Intersect genomic coordinates with matrix rows
Fragments

Get the Fragment objects
GRangesToString

GRanges to String
FindClonotypes

Find clonotypes
FragmentHistogram

Plot fragment length histogram
IdentifyVariants

Identify mitochondrial variants
GetLinkedPeaks

Get peaks linked to genes
GetTSSPositions

Find transcriptional start sites
Fragment-class

The Fragment class
Motif-class

The Motif class
MotifCounts

Count fragments surrounding motif sites
atac_small

A small example scATAC-seq dataset
blacklist_hg38_unified

Unified genomic blacklist regions for Human GRCh38
blacklist_hg38

Genomic blacklist regions for Human GRCh38
GetMotifData

Retrieve a motif matrix
LookupGeneCoords

Get gene coordinates
CombineTracks

Combine genome region plots
ExpressionPlot

Plot gene expression
DepthCor

Plot sequencing depth correlation
DownsampleFeatures

Downsample Features
blacklist_ce10

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

Find overlapping ranges for ChromatinAssay objects
granges-methods

Access genomic ranges for ChromatinAssay objects
theme_browser

Genome browser theme
Extend

Extend
SplitFragments

Split fragment file by cell identities
MatchRegionStats

Match DNA sequence characteristics
PlotFootprint

Plot motif footprinting results
Signac-package

Signac: Analysis of Single-Cell Chromatin Data
ReadMGATK

Read MGATK output
MotifPlot

Plot DNA sequence motif
StringToGRanges

String to GRanges
RunChromVAR

Run chromVAR
Motifs

Get or set a motif information
SubsetMatrix

Subset matrix rows and columns
RunSVD

Run singular value decomposition
blacklist_dm6

Genomic blacklist regions for Drosophila dm6 (0-based)
blacklist_ce11

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

Return the first rows of a fragment file
inter-range-methods

Inter-range transformations for ChromatinAssay objects
blacklist_hg19

Genomic blacklist regions for Human hg19 (0-based)
blacklist_dm3

Genomic blacklist regions for Drosophila dm3 (0-based)
GeneActivity

Create gene activity matrix
GenomeBinMatrix

Genome bin matrix
ValidateCells

Validate cells present in fragment file
ValidateFragments

Validate Fragment object
ValidateHash

Validate hashes for Fragment object
blacklist_mm10

Genomic blacklist regions for Mouse mm10 (0-based)
coverage,ChromatinAssay-method

Coverage of a ChromatinAssay object
LinkPlot

Plot linked genomic elements
Jaccard

Calculate the Jaccard index between two matrices
LinkPeaks

Link peaks to genes
Links

Get or set links information
subset.Motif

Subset a Motif object
seqinfo-methods

Access and modify sequence information for ChromatinAssay objects
RunTFIDF

Compute the term-frequency inverse-document-frequency
SetMotifData

Set motif data
TSSEnrichment

Compute TSS enrichment score per cell
TSSPlot

Plot signal enrichment around TSSs
VariantPlot

Plot strand concordance vs. VMR
as.ChromatinAssay

Convert objects to a ChromatinAssay
nearest-methods

Find the nearest range neighbors for ChromatinAssay objects
reexports

Objects exported from other packages