FetchData but with zeroes for unavailable genes

Usage

FetchDataZero(
  object,
  features,
  assay = "RNA",
  layer = "data",
  verbose = TRUE,
  srt = NULL,
  ...
)

object: A Seurat object.
features: Feature names.
assay: Which assay to use. Default is "RNA".
layer: Assay layer to use.
verbose: Whether to print the message. Default is TRUE.
srt: Deprecated alias for object; supply exactly one of the two. It will be removed in scop 1.0.0.
...: Arguments passed to other functions.