Subset GeneSetDb to only include specified genesets.

This is a utility function that is called by [.GeneSetDb and is not exported because it is not meant for external use.

# S3 method for GeneSetDb
subset(x, keep)

Arguments

x	a GeneSetDb()
keep	logical vector as long as nrow(geneSets(x, active.only=FALSE)

Value

a GeneSetDb that has only the results for the specified genesets.

Details

DEBUG: If keep is all FALSE, this will explode. What does an empty GeneSetDb look like, anyway? Something ...

We want to support a better, more fluent subsetting of GeneSetDb objects. See Issue #12 (https://github.com/lianos/multiGSEA/issues/12)

Examples

gdb.all <- exampleGeneSetDb()
gs <- geneSets(gdb.all)
gdb <- gdb.all[gs$collection %in% c("c2", "c7")]