Over the past few months I’ve added a few improvements to the repmis –miscellaneous functions for reproducible research–R package. I just want to briefly highlight two of them: Caching downloaded data sets. source_XlsxData for downloading data in Excel formatted files. Both of these capabilities are in repmis version 0.2.9 and greater. Caching When working with data sourced directly from the internet, it can be time consuming (and make the data hoster angry) to repeatedly download the data. So, repmis ’s source functions ( source_data , source_DropboxData , and source_XlsxData ) can now cache a downloaded data set by setting the argument cache = TRUE . For example: DisData <- source_data("http://bit.ly/156oQ7a", cache = TRUE) When the function is run again, the data set at http://bit.ly/156oQ7a will be loaded locally, rather than downloaded. To delete the cached data set, simply run the function again with the argument clearCache = TRUE . source_XlsxDat...