Hello all, I have an outstanding request to documents units [1] or other variable-specific facts in data files. I am thinking in particular of tab-delimited files that are suitable to be read into a data frame. One suggestion/request is to add a line of text under the column headings. My first thought was that it might be preferable to consume the first line in the file (perhaps making it easier to skip??), but then I found the comment.char option which appears made for the task. Is there a common/preferred way to tackle this? Bill [1] http://articles.cnn.com/1999-09-30/tech/9909_30_mars.metric.02_1_climate-orbiter-spacecraft-team-metric-system?_s=PM:TECH [[alternative HTML version deleted]]