Hey I want to identify data points by criteria, here is an example of my 1min data
Time Var1 Var2 00:00 1 0 00:01 0 0 00:02 1 0 00:03 1 0 00:04 0 0 00:05 1 0 00:06 1 0 00:07 1 0 00:08 1 0 00:09 0 0 00:10 1 0 00:11 1 0 00:12 1 0 00:13 0 0 I want to identify the data points where Var1=0 and Var2=0, ( in this example shud be the points highlighted above), then calculate the time duration between these data points, (in this example, shud be 3min, 5 min and 4min), then identify the starting point of the max time duration ( in this example shud be the starting point of 5-min-duration, return the data points at 00:09), finally return the value in "Time" column ( in this example shud be "00:09") Thanks for your help! [[alternative HTML version deleted]] ______________________________________________ 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.