Changes in version 1.53.0 - The pre-built ExpressionSet object, previously available via data(davidTiling) has been removed, alongside the bundled CEL files in inst/celfiles. To get the data from now on, please use the new getDavidTilingData() function, which will download the raw CEL files from ArrayExpress (or use a local cache if they were downloaded previously), and convert them to the ExpressionSet object via tilingArray::readCel2eSet().