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Toolkit for Single-Cell Velocity

Bioconductor version: Release (3.19)

This package provides Bioconductor-friendly wrappers for RNA velocity calculations in single-cell RNA-seq data. We use the basilisk package to manage Conda environments, and the zellkonverter package to convert data structures between SingleCellExperiment (R) and AnnData (Python). The information produced by the velocity methods is stored in the various components of the SingleCellExperiment class.

Author: Kevin Rue-Albrecht [aut, cre] , Aaron Lun [aut] , Charlotte Soneson [aut] , Michael Stadler [aut]

Maintainer: Kevin Rue-Albrecht <kevinrue67 at>

Citation (from within R, enter citation("velociraptor")):


To install this package, start R (version "4.4") and enter:

if (!require("BiocManager", quietly = TRUE))


For older versions of R, please refer to the appropriate Bioconductor release.


To view documentation for the version of this package installed in your system, start R and enter:

User's guide HTML R Script
Reference Manual PDF


biocViews Coverage, GeneExpression, Sequencing, SingleCell, Software
Version 1.14.3
In Bioconductor since BioC 3.12 (R-4.0) (3.5 years)
License MIT + file LICENSE
Depends SummarizedExperiment
Imports methods, stats, Matrix, BiocGenerics, reticulate, S4Vectors, DelayedArray, basilisk, zellkonverter, scuttle, SingleCellExperiment, BiocParallel, BiocSingular
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Suggests BiocStyle, testthat, knitr, rmarkdown, pkgdown, scran, scater, scRNAseq, Rtsne, graphics, grDevices, ggplot2, cowplot, GGally, patchwork, metR
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Follow Installation instructions to use this package in your R session.

Source Package velociraptor_1.14.3.tar.gz
Windows Binary (64-bit only)
macOS Binary (x86_64) velociraptor_1.14.3.tgz
macOS Binary (arm64) velociraptor_1.14.3.tgz
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Source Repository (Developer Access) git clone
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