On Friday 28 October 2011 18:04:59 Vinny Moriarty wrote: > Thanks everyone for you help with my last question, and now I have one > last one...
Here is what I would do, based on my understanding of your question: # your data snippet as data frame > x site time_local time_utc reef_type_code sensor_type 1 6 2006-04-09 10:20:00 2006-04-09 20:20:00 BAK sb39 2 6 2006-04-09 10:40:00 2006-04-09 20:40:00 BAK sb39 3 6 2006-04-09 11:00:00 2006-04-09 21:00:00 BAK sb39 4 6 2006-04-09 11:20:00 2006-04-09 21:20:00 BAK sb39 5 6 2006-04-09 11:40:00 2006-04-09 21:40:00 BAK sb39 6 6 2006-04-09 12:00:00 2006-04-09 22:00:00 BAK sb39 7 6 2006-04-09 12:20:00 2006-04-09 22:20:00 BAK sb39 8 6 2006-04-09 12:40:00 2006-04-09 22:40:00 BAK sb39 9 6 2006-04-09 13:00:00 2006-04-09 23:00:00 BAK sb39 sensor_depth_m temperature_c 1 2 29.63 2 2 29.56 3 2 29.51 4 2 29.53 5 10 29.57 6 2 29.60 7 2 29.66 8 10 29.68 9 2 29.68 # extracting all 10m depth sensors using subscripting > Ten <- x[x["sensor_depth_m"]==10,] > Ten site time_local time_utc reef_type_code sensor_type 5 6 2006-04-09 11:40:00 2006-04-09 21:40:00 BAK sb39 8 6 2006-04-09 12:40:00 2006-04-09 22:40:00 BAK sb39 sensor_depth_m temperature_c 5 10 29.57 8 10 29.68 Does that help? Rgds, Rainer On Friday 28 October 2011 18:04:59 Vinny Moriarty wrote: > Thanks everyone for you help with my last question, and now I have one > last one... > > > Here is a sample of my data in .csv format > > site,time_local,time_utc,reef_type_code,sensor_type,sensor_depth_m,temper > ature_c 06,2006-04-09 10:20:00,2006-04-09 20:20:00,BAK,sb39, 2, 29.63 > 06,2006-04-09 10:40:00,2006-04-09 20:40:00,BAK,sb39, 2, 29.56 > 06,2006-04-09 11:00:00,2006-04-09 21:00:00,BAK,sb39, 2, 29.51 > 06,2006-04-09 11:20:00,2006-04-09 21:20:00,BAK,sb39, 2, 29.53 > 06,2006-04-09 11:40:00,2006-04-09 21:40:00,BAK,sb39, 10, 29.57 > 06,2006-04-09 12:00:00,2006-04-09 22:00:00,BAK,sb39, 2, 29.60 > 06,2006-04-09 12:20:00,2006-04-09 22:20:00,BAK,sb39, 2, 29.66 > 06,2006-04-09 12:40:00,2006-04-09 22:40:00,BAK,sb39, 10, 29.68 > 06,2006-04-09 13:00:00,2006-04-09 23:00:00,BAK,sb39, 2, 29.68 > > > My goal was to extract all of the rows from a certain depth. Using the > column "sensor_depth_m" to order my data by, I wanted all of the data > from 10m. So this is what I wanted when I finished > > site,time_local,time_utc,reef_type_code,sensor_type,sensor_depth_m,temper > ature_c 06,2006-04-09 11:40:00,2006-04-09 21:40:00,BAK,sb39, 10, 29.57 > 06,2006-04-09 12:40:00,2006-04-09 22:40:00,BAK,sb39, 10, 29.68 > 06,2006-04-09 13:00:00,2006-04-09 23:00:00,BAK,sb39, 10, 29.68 > > > > > To pull out all of the data from a 10m sensor depth I came up with the > code: > > Ten<-dataTable1[(dataTable1$sensor_depth_m=="10"),] > > > But when I run it I just get an extra column tacked onto the end like > this > > > site,time_local,time_utc,reef_type_code,sensor_type,sensor_depth_m,temper > ature_c, sensor_depth_m > 06,2006-04-09 10:20:00,2006-04-09 20:20:00,BAK,sb39, 2, 29.63,10 > 06,2006-04-09 10:40:00,2006-04-09 20:40:00,BAK,sb39, 2, 29.56,10 > 06,2006-04-09 11:00:00,2006-04-09 21:00:00,BAK,sb39, 2, 29.51,10 > 06,2006-04-09 11:20:00,2006-04-09 21:20:00,BAK,sb39, 2, 29.53,10 > 06,2006-04-09 11:40:00,2006-04-09 21:40:00,BAK,sb39, 10, 29.57,10 > 06,2006-04-09 12:00:00,2006-04-09 22:00:00,BAK,sb39, 2, 29.60,10 > 06,2006-04-09 12:20:00,2006-04-09 22:20:00,BAK,sb39, 2, 29.66,10 > 06,2006-04-09 12:40:00,2006-04-09 22:40:00,BAK,sb39, 10, 29.68,10 > 06,2006-04-09 13:00:00,2006-04-09 23:00:00,BAK,sb39, 10, 29.68,10 > > > It seems pretty straight forward, I'm not sure what I am missing. > > > Thanks > > V > > [[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. ______________________________________________ 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.
