buildCellIndex: Build a cell Index

In scfind: A search tool for single cell RNA-seq data by gene lists

Description

Creates a compressed cell Index

Usage

buildCellIndex(object = NULL, cell_type_column = "cell_type1")

buildCellIndex.SCESet(object, cell_type_column)

## S4 method for signature 'SingleCellExperiment'
buildCellIndex(object = NULL,
  cell_type_column = "cell_type1")

Arguments

object	object of SingleCellExperiment class containing the cell classification information
cell_type_column	column name in the colData slot of the object SingleCellExperiment containing the cell classification information

Value

a 'data.frame' containing calculated gene index

Examples

library(SingleCellExperiment)
sce <- SingleCellExperiment(assays = list(normcounts = as.matrix(yan)), colData = ann)
# this is needed to calculate dropout rate for feature selection
# important: normcounts have the same zeros as raw counts (fpkm)
counts(sce) <- normcounts(sce)
logcounts(sce) <- log2(normcounts(sce) + 1)
# use gene names as feature symbols
rowData(sce)$feature_symbol <- rownames(sce)
isSpike(sce, 'ERCC') <- grepl('^ERCC-', rownames(sce))
# remove features with duplicated names
sce <- sce[!duplicated(rownames(sce)), ]
index <- buildCellIndex(sce)

scfind documentation built on April 28, 2020, 7:01 p.m.