I often annotate data files with #-delimited comments. I have found that annotation (experiment number, date, etc) are important for credibility and clarity.
For some reason, GRI did not deal with comments in data files except to report that a non-number was found. But in the source code, I found code for recognizing and removing comments. This patch allows that code to be compiled into read.cc and reports to stdout when a comment is found and in which file.
patch for read.cc that enables ignoring comments