[R] how to skip last lines while reading the data in R

[Gabor Grothendieck]

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...!!
>
> --
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