Check as.Date > Date: Wed, 11 Mar 2009 06:25:44 -0700 > From: [email protected] > To: [email protected] > Subject: [R] How to monthly,daily,yearly average > > Sorry, this is my first time to post. > > I have a big data set: first colume is date (ex: 2008-2-150, the second is > time (10:30:00), and the following columes are variaty measurement data. > Every 30 min, I have one data. > > I want to find an effecient way to calculate the hourly, daily, monthly and > yearly average, and plot them, and eventually use these average data to do > further analysis. > > Thanks! > Jeff > > > > [[alternative HTML version deleted]] > > ______________________________________________ > [email protected] 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.
_________________________________________________________________ News, entertainment and everything you care about at Live.com. Get it now! http://www.live.com/getstarted.aspx [[alternative HTML version deleted]] ______________________________________________ [email protected] 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.
