[R] Understand Rcode- subset

[Jhon Grey]

Hi!
Thanks for pointing out the mistake.
I am resubmitting my question as follows:
Hi!I am facing a problem in understanding the R-CodeSuppose I have a transactional dataset named- "transact" with its values like following:customer_ID <-c(10000000,10000000,10000000,10000000,10000000,10000000,10000000,10000000,10000000,10000005,10000005,10000005,10000005,10000005,10000005,10000007,10000007,10000007,10000007,10000007,10000007,10000007,10000007,10000013,10000013)shopping_pt <- c(1,2,2,3,4,5,6,7,8,9,1,2,3,4,5,6,1,2,3,4,5,6,7,8,1,2)record_type <- c(0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0)transact <- data.frame(customer_ID, shopping_pt, record_type)
How does the following code work id<-transact$record_type==1sub<-transact[c(id[2:length(id)],FALSE),]id<-c(id[3:length(id)],FALSE,FALSE) sub2<-transact[id,]Thanks in advance!
> Date: Mon, 24 Aug 2015 15:25:09 +0200
> Subject: Re: [R] Understand Rcode- subset
> From: thierry.onkelinx at inbo.be
> To: butt_its_me at hotmail.com
> CC: r-help at r-project.org
> 
> Posting in HTML mangles up your code, making it hard to read. Please
> resend your question in plain text and make the code reproducible. See
> http://adv-r.had.co.nz/Reproducibility.html for more details on that.
> ir. Thierry Onkelinx
> Instituut voor natuur- en bosonderzoek / Research Institute for Nature
> and Forest
> team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
> Kliniekstraat 25
> 1070 Anderlecht
> Belgium
> 
> To call in the statistician after the experiment is done may be no
> more than asking him to perform a post-mortem examination: he may be
> able to say what the experiment died of. ~ Sir Ronald Aylmer Fisher
> The plural of anecdote is not data. ~ Roger Brinner
> The combination of some data and an aching desire for an answer does
> not ensure that a reasonable answer can be extracted from a given body
> of data. ~ John Tukey
> 
> 
> 2015-08-24 13:00 GMT+02:00 Jhon Grey <butt_its_me at hotmail.com>:
> > Hi!
> > I am facing a problem in understanding the R-Code
> > Suppose I have a dataset named- transact with its values like following:
> >
> >
> >
> >
> >
> >   customer_ID
> >   shopping_pt
> >   record_type
> >
> >
> >   10000000
> >   1
> >   0
> >
> >
> >   10000000
> >   2
> >   0
> >
> >
> >   10000000
> >   3
> >   0
> >
> >
> >   10000000
> >   4
> >   0
> >
> >
> >   10000000
> >   5
> >   0
> >
> >
> >   10000000
> >   6
> >   0
> >
> >
> >   10000000
> >   7
> >   0
> >
> >
> >   10000000
> >   8
> >   0
> >
> >
> >   10000000
> >   9
> >   1
> >
> >
> >   10000005
> >   1
> >   0
> >
> >
> >   10000005
> >   2
> >   0
> >
> >
> >   10000005
> >   3
> >   0
> >
> >
> >   10000005
> >   4
> >   0
> >
> >
> >   10000005
> >   5
> >   0
> >
> >
> >   10000005
> >   6
> >   1
> >
> >
> >   10000007
> >   1
> >   0
> >
> >
> >   10000007
> >   2
> >   0
> >
> >
> >   10000007
> >   3
> >   0
> >
> >
> >   10000007
> >   4
> >   0
> >
> > How does the following code work and the results of sub and id-
> > id<-transact$record_type==1sub<-train[c(id[2:length(id)],FALSE),]id<-c(id[3:length(id)],FALSE,FALSE) sub2<-train[id,]
> > Thanks in advance!
> >
> >         [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help at 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]]