This is programming style, best practices type of question. When converting a list to a data frame (eg to use in ggplot), what is "best" way to store descriptive elements? For example, a survfit object mostly maps to a data frame, but I would also like to carry along the type, call, etc. I'm inclined to make these attributes of the data frame. Any better technique? TIA, Jim Porzak TGN.com San Francisco, CA www.linkedin.com/in/jimporzak use R! Group SF: www.meetup.com/R-Users/ [[alternative HTML version deleted]]