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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://stuartlab.org/signac/

Installation

To install the latest release of Signac from CRAN:

setRepositories(ind=1:3) # needed to automatically install Bioconductor dependencies
install.packages("Signac")

To release the latest develop version from GitHub:

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

Release notes

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

Contributing

We welcome contributions to the Signac package. Please see the contribution guide for more information.

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.

Roadmap

Signac runs on a quarterly release schedule. Additional releases will be scheduled in the case of urgent bug fixes. The development roadmap can be viewed on GitHub here.

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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Install

install.packages('Signac')

Monthly Downloads

6,989

Version

1.10.0

License

MIT + file LICENSE

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Maintainer

Last Published

May 30th, 2023

Functions in Signac (1.10.0)

FindClonotypes

Find clonotypes
ClusterClonotypes

Find relationships between clonotypes
AccessiblePeaks

Accessible peaks
ConnectionsToLinks

Cicero connections to links
FragmentHistogram

Plot fragment length histogram
AlleleFreq

Compute allele frequencies per cell
ConvertMotifID

Convert between motif name and motif ID
CombineTracks

Combine genome region plots
BigwigTrack

Plot data from BigWig files
CoverageBrowser

Genome browser
Annotation

Annotation
CoveragePlot

Plot Tn5 insertion frequency over a region
AddMotifs

Add DNA sequence motif information
FindMotifs

FindMotifs
BinarizeCounts

Binarize counts
AddChromatinModule

Add chromatin module
CallPeaks

Call peaks
ChromatinAssay-class

The ChromatinAssay class
RegionStats

Compute base composition information for genomic ranges
RunSVD

Run singular value decomposition
ClosestFeature

Closest Feature
DensityScatter

Scatterplot colored by point density
AggregateTiles

Quantify aggregated genome tiles
CountFragments

Count fragments
ExpressionPlot

Plot gene expression
CountsInRegion

Counts in region
Cells.Fragment

Set and get cell barcode information for a Fragment object
GeneActivity

Create gene activity matrix
Cells<-

Set and get cell barcode information for a Fragment object
LinkPeaks

Link peaks to genes
DepthCor

Plot sequencing depth correlation
DownsampleFeatures

Downsample Features
GetFootprintData

Get footprinting data
IntersectMatrix

Intersect genomic coordinates with matrix rows
CellsPerGroup

Cells per group
CreateChromatinAssay

Create ChromatinAssay object
blacklist_dm6

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

Get Fragment object data
GetLinkedPeaks

Get peaks linked to genes
blacklist_hg38

Genomic blacklist regions for Human GRCh38
GetGRangesFromEnsDb

Extract genomic ranges from EnsDb object
coverage,ChromatinAssay-method

Coverage of a ChromatinAssay object
CreateFragmentObject

Create a Fragment object
GenomeBinMatrix

Genome bin matrix
subset.Fragment

Subset a Fragment object
FractionCountsInRegion

Fraction of counts in a genomic region
Motifs

Get or set a motif information
ValidateHash

Validate hashes for Fragment object
LinkPlot

Plot linked genomic elements
GetMotifData

Retrieve a motif matrix
Fragment-class

The Fragment class
GetIntersectingFeatures

Find intersecting regions between two objects
Jaccard

Calculate the Jaccard index between two matrices
NucleosomeSignal

NucleosomeSignal
FRiP

Calculate fraction of reads in peaks per cell
Extend

Extend
CreateMotifObject

Create motif object
RunTFIDF

Compute the term-frequency inverse-document-frequency
FindTopFeatures

Find most frequently observed features
blacklist_ce11

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

Compute Tn5 insertion bias
CreateMotifMatrix

Create motif matrix
Footprint

Transcription factor footprinting analysis
MatchRegionStats

Match DNA sequence characteristics
UpdatePath

Update the file path for a Fragment object
PeakPlot

Plot peaks in a genomic region
theme_browser

Genome browser theme
GetTSSPositions

Find transcriptional start sites
Motif-class

The Motif class
RegionPlot

Region plot
SubsetMatrix

Subset matrix rows and columns
GRangesToString

GRanges to String
RunChromVAR

Run chromVAR
blacklist_hg38_unified

Unified genomic blacklist regions for Human GRCh38
FeatureMatrix

Feature Matrix
MotifCounts

Count fragments surrounding motif sites
GetCellsInRegion

Get cells in a region
FilterCells

Filter cells from fragment file
PlotFootprint

Plot motif footprinting results
blacklist_mm10

Genomic blacklist regions for Mouse mm10 (0-based)
IdentifyVariants

Identify mitochondrial variants
MotifPlot

Plot DNA sequence motif
as.ChromatinAssay

Convert objects to a ChromatinAssay
UnifyPeaks

Unify genomic ranges
TSSPlot

Plot signal enrichment around TSSs
TilePlot

Plot integration sites per cell
blacklist_hg19

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

Plot strand concordance vs. VMR
SplitFragments

Split fragment file by cell identities
TSSEnrichment

Compute TSS enrichment score per cell
atac_small

A small example scATAC-seq dataset
findOverlaps-methods

Find overlapping ranges for ChromatinAssay objects
blacklist_ce10

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

Subset a Motif object
GetLinkedGenes

Get genes linked to peaks
ReadMGATK

Read MGATK output
granges-methods

Access genomic ranges for ChromatinAssay objects
RegionHeatmap

Region heatmap
blacklist_dm3

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

String to GRanges
LookupGeneCoords

Get gene coordinates
head.Fragment

Return the first rows of a fragment file
Fragments

Get the Fragment objects
Links

Get or set links information
SetMotifData

Set motif data
ValidateFragments

Validate Fragment object
RegionMatrix

Region enrichment analysis
ValidateCells

Validate cells present in fragment file
inter-range-methods

Inter-range transformations for ChromatinAssay objects
Signac-package

Signac: Analysis of Single-Cell Chromatin Data
seqinfo-methods

Access and modify sequence information for ChromatinAssay objects
nearest-methods

Find the nearest range neighbors for ChromatinAssay objects
reexports

Objects exported from other packages
AnnotationPlot

Plot gene annotations
AverageCounts

Average Counts