---------- Forwarded message ---------- From: B. Bahar <bahar.612000@gmail.com> Date: Tue, Nov 6, 2012 at 7:57 PM Subject: avarage my data each hour To: r-help@r-project.org Hello, I have much more than one milion tempreture is gained each 15 seconds. So each 15 seconds, I have one data. How could I calculate avarage datas in each hour in R? If you could help me. [[alternative HTML version deleted]]