You can make a step-number variable with cumsum(grepl("^Step ", ...)) and use it as the splitting variable in split. E.g.,
> dat <- read.table(yourFile, stringsAsFactors=FALSE, sep="|", colClasses=c("NULL", "character", "character", "character"), col.names=c("Junk","Date","Time","Type")) > dat <- with(dat, data.frame(DateTime=as.POSIXct(paste(Date, Time), format="%m/%d/%Y %H:%M:%S"), Type=Type, stringsAsFactors=FALSE)) > head(dat) DateTime Type 1 2016-06-16 03:44:16 Step 001 2 2016-06-16 03:44:16 Initialization 3 2016-06-16 03:44:16 Filters 4 2016-06-16 03:45:03 Split Items 5 2016-06-16 03:46:20 Sort 6 2016-06-16 03:46:43 Check > split(dat, cumsum(grepl("^Step ", dat$Type))) $`1` DateTime Type 1 2016-06-16 03:44:16 Step 001 2 2016-06-16 03:44:16 Initialization ... 13 2016-06-16 04:06:33 BOP processing for 7,960 items has finished $`2` DateTime Type 14 2016-06-16 04:06:34 Step 002 15 2016-06-16 04:06:35 Initialization ... Bill Dunlap TIBCO Software wdunlap tibco.com On Thu, Jun 16, 2016 at 8:42 PM, Satish Vadlamani < satish.vadlam...@gmail.com> wrote: > Hello, > I have multiple text files with the format shown below (see the two files > that I pasted below). Each file is a log of multiple steps that the system > has processed and for each step, it has shown the start time of the process > step. For example, in the data below, the filter started at > |06/16/2016|03:44:16 > > How to read this data so that Step 001 is one data frame, Step 002 is > another, and so on. After I do this, I will then compare the Step 001 times > with and without parallel process. > > For example, the files pasted below "no_parallel_process_SLS_4.txt" and > "parallel_process_SLS_4.txt" will make it clear what I am trying to do. I > want to compare the parallel process times taken for each step with the non > parallel process times. > > If there are better ways of performing this task that what I am thinking, > could you let me know? Thanks in advance. > > Satish Vadlamani > > >> parallel_process_file.txt > > |06/16/2016|03:44:16|Step 001 > |06/16/2016|03:44:16|Initialization > |06/16/2016|03:44:16|Filters > |06/16/2016|03:45:03|Split Items > |06/16/2016|03:46:20|Sort > |06/16/2016|03:46:43|Check > |06/16/2016|04:01:13|Save > |06/16/2016|04:04:35|Update preparation > |06/16/2016|04:04:36|Update comparison > |06/16/2016|04:04:38|Update > |06/16/2016|04:04:38|Update > |06/16/2016|04:06:01|Close > |06/16/2016|04:06:33|BOP processing for 7,960 items has finished > |06/16/2016|04:06:34|Step 002 > |06/16/2016|04:06:35|Initialization > |06/16/2016|04:06:35|Filters > |06/16/2016|04:07:14|Split Items > |06/16/2016|04:08:57|Sort > |06/16/2016|04:09:06|Check > |06/16/2016|04:26:36|Save > |06/16/2016|04:39:29|Update preparation > |06/16/2016|04:39:31|Update comparison > |06/16/2016|04:39:43|Update > |06/16/2016|04:39:45|Update > |06/16/2016|04:44:28|Close > |06/16/2016|04:45:26|BOP processing for 8,420 items has finished > |06/16/2016|04:45:27|Step 003 > |06/16/2016|04:45:27|Initialization > |06/16/2016|04:45:27|Filters > |06/16/2016|04:48:50|Split Items > |06/16/2016|04:55:15|Sort > |06/16/2016|04:55:40|Check > |06/16/2016|05:13:35|Save > |06/16/2016|05:17:34|Update preparation > |06/16/2016|05:17:34|Update comparison > |06/16/2016|05:17:36|Update > |06/16/2016|05:17:36|Update > |06/16/2016|05:19:29|Close > |06/16/2016|05:19:49|BOP processing for 8,876 items has finished > |06/16/2016|05:19:50|Step 004 > |06/16/2016|05:19:50|Initialization > |06/16/2016|05:19:50|Filters > |06/16/2016|05:20:43|Split Items > |06/16/2016|05:22:14|Sort > |06/16/2016|05:22:29|Check > |06/16/2016|05:37:27|Save > |06/16/2016|05:38:43|Update preparation > |06/16/2016|05:38:44|Update comparison > |06/16/2016|05:38:45|Update > |06/16/2016|05:38:45|Update > |06/16/2016|05:39:09|Close > |06/16/2016|05:39:19|BOP processing for 5,391 items has finished > |06/16/2016|05:39:20|Step 005 > |06/16/2016|05:39:20|Initialization > |06/16/2016|05:39:20|Filters > |06/16/2016|05:39:57|Split Items > |06/16/2016|05:40:21|Sort > |06/16/2016|05:40:24|Check > |06/16/2016|05:46:01|Save > |06/16/2016|05:46:54|Update preparation > |06/16/2016|05:46:54|Update comparison > |06/16/2016|05:46:54|Update > |06/16/2016|05:46:55|Update > |06/16/2016|05:47:24|Close > |06/16/2016|05:47:31|BOP processing for 3,016 items has finished > |06/16/2016|05:47:32|Step 006 > |06/16/2016|05:47:32|Initialization > |06/16/2016|05:47:32|Filters > |06/16/2016|05:47:32|Update preparation > |06/16/2016|05:47:32|Update comparison > |06/16/2016|05:47:32|Update > |06/16/2016|05:47:32|Close > |06/16/2016|05:47:33|BOP processing for 0 items has finished > |06/16/2016|05:47:33|Step 007 > |06/16/2016|05:47:33|Initialization > |06/16/2016|05:47:33|Filters > |06/16/2016|05:47:34|Split Items > |06/16/2016|05:47:34|Sort > |06/16/2016|05:47:34|Check > |06/16/2016|05:47:37|Save > |06/16/2016|05:47:37|Update preparation > |06/16/2016|05:47:37|Update comparison > |06/16/2016|05:47:37|Update > |06/16/2016|05:47:37|Update > |06/16/2016|05:47:37|Close > |06/16/2016|05:47:37|BOP processing for 9 items has finished > |06/16/2016|05:47:37|Step 008 > |06/16/2016|05:47:37|Initialization > |06/16/2016|05:47:37|Filters > |06/16/2016|05:47:38|Update preparation > |06/16/2016|05:47:38|Update comparison > |06/16/2016|05:47:38|Update > |06/16/2016|05:47:38|Close > |06/16/2016|05:47:38|BOP processing for 0 items has finished > > > > > >> no_parallel_process_file.txt > > |06/15/2016|22:52:46|Step 001 > |06/15/2016|22:52:46|Initialization > > |06/15/2016|22:52:46|Filters > > |06/15/2016|22:54:21|Split Items > > |06/15/2016|22:55:10|Sort > > |06/15/2016|22:55:15|Check > > |06/15/2016|23:04:43|Save > > |06/15/2016|23:06:38|Update preparation > > |06/15/2016|23:06:38|Update comparison > > |06/15/2016|23:06:39|Update > > |06/15/2016|23:06:39|Update > > |06/15/2016|23:12:04|Close > > |06/15/2016|23:13:16|BOP processing for 7,942 items has finished > > |06/15/2016|23:13:17|Step 002 > |06/15/2016|23:13:17|Initialization > > |06/15/2016|23:13:17|Filters > > |06/15/2016|23:16:27|Split Items > > |06/15/2016|23:20:18|Sort > > |06/15/2016|23:20:34|Check > > |06/16/2016|00:08:08|Save > > |06/16/2016|00:26:19|Update preparation > > |06/16/2016|00:26:20|Update comparison > > |06/16/2016|00:26:30|Update > > |06/16/2016|00:26:31|Update > > |06/16/2016|00:42:31|Close > > |06/16/2016|00:45:09|BOP processing for 8,400 items has finished > > |06/16/2016|00:45:11|Step 003 > |06/16/2016|00:45:12|Initialization > > |06/16/2016|00:45:12|Filters > > |06/16/2016|00:53:01|Split Items > > |06/16/2016|01:01:44|Sort > > |06/16/2016|01:02:55|Check > > |06/16/2016|01:41:40|Save > > |06/16/2016|01:44:37|Update preparation > > |06/16/2016|01:44:37|Update comparison > > |06/16/2016|01:44:39|Update > > |06/16/2016|01:44:39|Update > > |06/16/2016|01:47:37|Close > > |06/16/2016|01:48:07|BOP processing for 8,867 items has finished > > |06/16/2016|01:48:08|Step 004 > |06/16/2016|01:48:08|Initialization > > |06/16/2016|01:48:08|Filters > > |06/16/2016|01:49:51|Split Items > > |06/16/2016|01:50:35|Sort > > |06/16/2016|01:50:39|Check > > |06/16/2016|01:59:12|Save > > |06/16/2016|02:00:47|Update preparation > > |06/16/2016|02:00:47|Update comparison > > |06/16/2016|02:00:48|Update > > |06/16/2016|02:00:48|Update > > |06/16/2016|02:02:40|Close > > |06/16/2016|02:02:55|BOP processing for 5,383 items has finished > > |06/16/2016|02:02:56|Step 005 > |06/16/2016|02:02:56|Initialization > > |06/16/2016|02:02:56|Filters > > |06/16/2016|02:03:47|Split Items > > |06/16/2016|02:04:19|Sort > > |06/16/2016|02:04:21|Check > > |06/16/2016|02:08:08|Save > > |06/16/2016|02:09:22|Update preparation > > |06/16/2016|02:09:22|Update comparison > > |06/16/2016|02:09:22|Update > > |06/16/2016|02:09:22|Update > > |06/16/2016|02:11:03|Close > > |06/16/2016|02:11:14|BOP processing for 3,016 items has finished > > |06/16/2016|02:11:14|Step 006 > |06/16/2016|02:11:14|Initialization > > |06/16/2016|02:11:14|Filters > > |06/16/2016|02:11:15|Update preparation > > |06/16/2016|02:11:15|Update comparison > > |06/16/2016|02:11:15|Update > > |06/16/2016|02:11:15|Close > > |06/16/2016|02:11:15|BOP processing for 0 items has finished > > |06/16/2016|02:11:15|Step 007 > |06/16/2016|02:11:15|Initialization > > |06/16/2016|02:11:15|Filters > > |06/16/2016|02:11:17|Split Items > > |06/16/2016|02:11:17|Sort > > |06/16/2016|02:11:17|Check > > |06/16/2016|02:11:20|Save > > |06/16/2016|02:11:20|Update preparation > > |06/16/2016|02:11:20|Update comparison > > |06/16/2016|02:11:20|Update > > |06/16/2016|02:11:20|Update > > |06/16/2016|02:11:20|Close > > |06/16/2016|02:11:20|BOP processing for 9 items has finished > > |06/16/2016|02:11:20|Step 008 > |06/16/2016|02:11:20|Initialization > > |06/16/2016|02:11:21|Filters > > |06/16/2016|02:11:21|Update preparation > > |06/16/2016|02:11:21|Update comparison > > |06/16/2016|02:11:21|Update > > |06/16/2016|02:11:21|Close > > |06/16/2016|02:11:21|BOP processing for 0 items has finished > > > > -- > > Satish Vadlamani > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.