Hi experts,
I want to read only the half of my data frame, which I read it from clip
board, and save it in a list. I wrote this code but it doesnt work:
ck<-read.table("clipboard")
datalist<-list()
d<-dim(ck)[1]
i<-1
repeat
{
datalist<-c(datalist,ck[i,])
i<-i+2
if(i>d)
{break}
}
datalist
[[alternative HTML version deleted]]
You don't need a loop nor a growing object.
data(mtcars)
mtcars
mtcars[seq(1, nrow(mtcars), by = 2), ]
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
+ 32 2 525 02 51
+ 32 54 43 61 85
Thierry.Onkelinx at inbo.be
www.inbo.be
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
-----Oorspronkelijk bericht-----
Van: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
Namens Baro
Verzonden: dinsdag 5 november 2013 15:42
Aan: R help
Onderwerp: [R] Problem while reading Data from a data frame
Hi experts,
I want to read only the half of my data frame, which I read it from clip board,
and save it in a list. I wrote this code but it doesnt work:
ck<-read.table("clipboard")
datalist<-list()
d<-dim(ck)[1]
i<-1
repeat
{
datalist<-c(datalist,ck[i,])
i<-i+2
if(i>d)
{break}
}
datalist
[[alternative HTML version deleted]]
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Hi You shall probably use C or similar program for such task. As I understand you want only odd rows. If yes, this will do it for you odd<-seq(1,d,2) datalist<-cd[odd,] If not please explain better your real intention. Regards Petr> -----Original Message----- > From: r-help-bounces at r-project.org [mailto:r-help-bounces at r- > project.org] On Behalf Of Baro > Sent: Tuesday, November 05, 2013 3:42 PM > To: R help > Subject: [R] Problem while reading Data from a data frame > > Hi experts, > > I want to read only the half of my data frame, which I read it from > clip board, and save it in a list. I wrote this code but it doesnt > work: > > ck<-read.table("clipboard") > datalist<-list() > d<-dim(ck)[1] > i<-1 > > repeat > { > datalist<-c(datalist,ck[i,]) > i<-i+2 > if(i>d) > {break} > } > datalist > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at 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.