On May 7, 2013, at 8:40 PM, jpm miao wrote: > Is there a function in R that calculate the mean and median for a grouped > data? > For example, a survey shows the oil price outlook in the future. How can I > calculate the mean/median? > (Of course, I understand that the groups "below 80" and "above 110" must be > defined more specifically) > > below 80 4 80-90 5 90-100 8 100-110 7 above 110 3 >
Why would all groups need to be defined more specifically? How do we know whether items in the 80-90 range are evenly distributed? .... could be 80, 81, 82, 84, 85 or all 89's. David Winsemius Alameda, CA, USA ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
