selectFeatures: Simple feature selection by feature counts

In celda: CEllular Latent Dirichlet Allocation

Description

A simple heuristic feature selection procedure. Select features with at least minCount counts in at least minCell cells. A SingleCellExperiment object with subset features will be stored in the altExp slot with name altExpName. The name of the assay slot in altExp will be the same as useAssay.

Usage

selectFeatures(x, ...)

## S4 method for signature 'SingleCellExperiment'
selectFeatures(
  x,
  minCount = 3,
  minCell = 3,
  useAssay = "counts",
  altExpName = "featureSubset"
)

## S4 method for signature 'matrix'
selectFeatures(
  x,
  minCount = 3,
  minCell = 3,
  useAssay = "counts",
  altExpName = "featureSubset"
)

Arguments

x	A numeric matrix of counts or a SingleCellExperiment with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells.
...	Ignored. Placeholder to prevent check warning.
minCount	Minimum number of counts required for feature selection.
minCell	Minimum number of cells required for feature selection.
useAssay	A string specifying the name of the assay slot to use. Default "counts".
altExpName	The name for the altExp slot to use. Default "featureSubset".

Value

A SingleCellExperiment object with a altExpName altExp slot. Function parameter settings are stored in the metadata "select_features" slot.

Examples

data(sceCeldaCG)
sce <- selectFeatures(sceCeldaCG)
data(celdaCGSim)
sce <- selectFeatures(celdaCGSim$counts)

celda documentation built on Nov. 8, 2020, 8:24 p.m.