Highlights d Modeling time-resolved scRNA-seq data avoids pitfalls of splicing RNA velocities d Dynamo reconstructs analytical vector fields from discrete velocity vectors d Vector fields reveal the timing and mechanisms of human hematopoiesis d Dynamo allows cell-state transition path and in silico perturbation predictions
Analysis of single-cell RNA-seq data begins with the pre-processing of reads to generate count matrices. We investigate algorithm choices for the challenges of pre-processing, and describe a workflow that balances efficiency and accuracy. Our workflow is based on the kallisto and bustools programs, and is near-optimal in speed and memory. The workflow is modular, and we demonstrate its flexibility by showing how it can be used for RNA velocity analyses.
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