Gene Expression Data Sources

Description

DataSource is an S3 generic function that creates prototype-like objects whose get method fetches datasets from a given source/repository.

The CellMix package provides DataSource objects for GEO (via the GEOquery package), ArrayExpress (via the ArrayExpress package), as well as the internal CellMix registry -- which itself fetches datasets from multiple repositories using other DataSource objects.

isDataSource tests if an object is a DataSource.