Creates a feature descriptor for interactive ease

Creates a data.frame of features and assays they come from

create_assay_feature_descriptor(x, features = NULL, assay_name = NULL)

Arguments

x	FacileDataSet
features	a character string of fearture ids (requires assay_name) or a data.frame with feature_id column.
assay_name	the assay to get the featurespace from. if this is provided, it will trump an already existing assay_name column in features

Value

a feature descriptor with feature_id and assay_name, which can be used to absolutely find features