annotation: A character describing the platform on which the samples were assayed.
This is often the name of a Bioconductor chip annotation package, which facilitated down-stream analysis.
For instance, EntrezIdVector and EnsemblIdVector could store the org*db package that should be used to fetch information about each identifier.
As for
?ExpressionSet
:For instance,
EntrezIdVector
andEnsemblIdVector
could store theorg*db
package that should be used to fetch information about each identifier.