[R] Understand Rcode- subset

[Thierry Onkelinx]

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 op 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]]
>
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