Learn R Programming

⚠️There's a newer version (1.16.0) of this package.Take me there.

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

Copy Link

Version

Install

install.packages('Signac')

Monthly Downloads

8,225

Version

1.12.0

License

MIT + file LICENSE

Issues

Pull Requests

Stars

Forks

Maintainer

Tim Stuart

Last Published

November 8th, 2023

Functions in Signac (1.12.0)

ClusterClonotypes

Find relationships between clonotypes
CountFragments

Count fragments
ConvertMotifID

Convert between motif name and motif ID
CreateMotifObject

Create motif object
CreateMotifMatrix

Create motif matrix
CreateFragmentObject

Create a Fragment object
CreateChromatinAssay

Create ChromatinAssay object
CountsInRegion

Counts in region
FindMotifs

FindMotifs
DownsampleFeatures

Downsample Features
GetFragmentData

Get Fragment object data
ExpressionPlot

Plot gene expression
FindClonotypes

Find clonotypes
FindTopFeatures

Find most frequently observed features
Footprint

Transcription factor footprinting analysis
FilterCells

Filter cells from fragment file
GenomeBinMatrix

Genome bin matrix
GetFootprintData

Get footprinting data
GetCellsInRegion

Get cells in a region
FeatureMatrix

Feature Matrix
IntersectMatrix

Intersect genomic coordinates with matrix rows
GetLinkedGenes

Get genes linked to peaks
GetLinkedPeaks

Get peaks linked to genes
GetIntersectingFeatures

Find intersecting regions between two objects
GetGRangesFromEnsDb

Extract genomic ranges from EnsDb object
Jaccard

Calculate the Jaccard index between two matrices
GetMotifData

Retrieve a motif matrix
FragmentHistogram

Plot fragment length histogram
Fragments

Get the Fragment objects
NucleosomeSignal

NucleosomeSignal
MatchRegionStats

Match DNA sequence characteristics
Motif-class

The Motif class
Motifs

Get or set a motif information
ReadMGATK

Read MGATK output
DepthCor

Plot sequencing depth correlation
FractionCountsInRegion

Fraction of counts in a genomic region
RunSVD

Run singular value decomposition
DensityScatter

Scatterplot colored by point density
Fragment-class

The Fragment class
InsertionBias

Compute Tn5 insertion bias
SplitFragments

Split fragment file by cell identities
blacklist_dm3

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

Plot motif footprinting results
IdentifyVariants

Identify mitochondrial variants
RegionHeatmap

Region heatmap
PeakPlot

Plot peaks in a genomic region
LookupGeneCoords

Get gene coordinates
GetTSSPositions

Find transcriptional start sites
Links

Get or set links information
RunTFIDF

Compute the term-frequency inverse-document-frequency
SubsetMatrix

Subset matrix rows and columns
StringToGRanges

String to GRanges
blacklist_dm6

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

Validate cells present in fragment file
ValidateFragments

Validate Fragment object
LinkPeaks

Link peaks to genes
inter-range-methods

Inter-range transformations for ChromatinAssay objects
nearest-methods

Find the nearest range neighbors for ChromatinAssay objects
TSSEnrichment

Compute TSS enrichment score per cell
UnifyPeaks

Unify genomic ranges
UpdatePath

Update the file path for a Fragment object
blacklist_hg19

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

Genome browser
blacklist_ce11

Genomic blacklist regions for C. elegans ce11 (0-based)
blacklist_ce10

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

Validate hashes for Fragment object
VariantPlot

Plot strand concordance vs. VMR
blacklist_hg38_unified

Unified genomic blacklist regions for Human GRCh38
granges-methods

Access genomic ranges for ChromatinAssay objects
head.Fragment

Return the first rows of a fragment file
subset.Fragment

Subset a Fragment object
Extend

Extend
FRiP

Calculate fraction of reads in peaks per cell
blacklist_mm10

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

Plot signal enrichment around TSSs
RegionMatrix

Region enrichment analysis
reexports

Objects exported from other packages
CoveragePlot

Plot Tn5 insertion frequency over a region
RegionStats

Compute base composition information for genomic ranges
GRangesToString

GRanges to String
GeneActivity

Create gene activity matrix
LinkPlot

Plot linked genomic elements
RegionPlot

Region plot
seqinfo-methods

Access and modify sequence information for ChromatinAssay objects
TilePlot

Plot integration sites per cell
blacklist_hg38

Genomic blacklist regions for Human GRCh38
MotifPlot

Plot DNA sequence motif
MotifCounts

Count fragments surrounding motif sites
SetMotifData

Set motif data
RunChromVAR

Run chromVAR
Signac-package

Signac: Analysis of Single-Cell Chromatin Data
as.ChromatinAssay

Convert objects to a ChromatinAssay
atac_small

A small example scATAC-seq dataset
subset.Motif

Subset a Motif object
theme_browser

Genome browser theme
findOverlaps-methods

Find overlapping ranges for ChromatinAssay objects
coverage,ChromatinAssay-method

Coverage of a ChromatinAssay object
AnnotationPlot

Plot gene annotations
BinarizeCounts

Binarize counts
AverageCounts

Average Counts
AddMotifs

Add DNA sequence motif information
BigwigTrack

Plot data from BigWig files
AccessiblePeaks

Accessible peaks
Annotation

Annotation
AggregateTiles

Quantify aggregated genome tiles
AlleleFreq

Compute allele frequencies per cell
AddChromatinModule

Add chromatin module
ClosestFeature

Closest Feature
ConnectionsToLinks

Cicero connections to links
CallPeaks

Call peaks
Cells.Fragment

Set and get cell barcode information for a Fragment object
ChromatinAssay-class

The ChromatinAssay class
CombineTracks

Combine genome region plots
CellsPerGroup

Cells per group
Cells<-

Set and get cell barcode information for a Fragment object