hey all greetings hey all am an engineering student...and am trying to learn R i am trying to automate reading a specific type of file...and perform certain functions...but i want to omit lines in the end of the file.. there is an option for skiping the lines before begining...but how can i ask R to read till n-2th or n-3th row...or skip the last 2 or 3 rows while reading... i have files of diff. number of lines...!! i wd be grateful to u if u can help me out of this..!!! thanks in advance Rafi...!! -- View this message in context: http://www.nabble.com/how-to-skip-last-lines-while-reading-the-data-in-R-tp15132030p15132030.html Sent from the R help mailing list archive at Nabble.com.
Henrique Dallazuanna
2008-Jan-28 10:31 UTC
[R] how to skip last lines while reading the data in R
Perhaps:
data <-
read.table(textConnection(rev(rev(readLines('data.txt'))[-(1:2)])))
will skip the last two lines '-(1:2)'
On 28/01/2008, mrafi <confessin at gmail.com>
wrote:>
> hey all
> greetings
>
> hey all am an engineering student...and am trying to learn R
> i am trying to automate reading a specific type of file...and perform
> certain functions...but i want to omit lines in the end of the file..
> there is an option for skiping the lines before begining...but how can i
ask
> R to read till n-2th or n-3th row...or skip the last 2 or 3 rows while
> reading...
> i have files of diff. number of lines...!!
> i wd be grateful to u if u can help me out of this..!!!
> thanks in advance
> Rafi...!!
>
> --
> View this message in context:
http://www.nabble.com/how-to-skip-last-lines-while-reading-the-data-in-R-tp15132030p15132030.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> 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.
>
--
Henrique Dallazuanna
Curitiba-Paran?-Brasil
25? 25' 40" S 49? 16' 22" O
Gabor Grothendieck
2008-Jan-28 15:52 UTC
[R] how to skip last lines while reading the data in R
If you don't mind reading it in twice its just:
DF <- read.table("xy.dat", header = TRUE, nrow
length(readLines("xy.dat")) - 3)
tail(DF)
# or
DF <- read.table("xy.dat", header = TRUE, nrow
length(count.fields("xy.dat")) - 3)
tail(DF)
# or
DF <- read.table("xy.dat", header = TRUE, nrow
nrow(read.table("xy.dat", header = TRUE)) - 2)
tail(DF)
On Jan 28, 2008 5:10 AM, mrafi <confessin at gmail.com>
wrote:>
> hey all
> greetings
>
> hey all am an engineering student...and am trying to learn R
> i am trying to automate reading a specific type of file...and perform
> certain functions...but i want to omit lines in the end of the file..
> there is an option for skiping the lines before begining...but how can i
ask
> R to read till n-2th or n-3th row...or skip the last 2 or 3 rows while
> reading...
> i have files of diff. number of lines...!!
> i wd be grateful to u if u can help me out of this..!!!
> thanks in advance
> Rafi...!!
>
> --
> View this message in context:
http://www.nabble.com/how-to-skip-last-lines-while-reading-the-data-in-R-tp15132030p15132030.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> 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.
>