[R] How to read a row dataset one by one

[Jan Sabee]

For Henrik and Clark, thanks for your help.
Then If I load to dataframe,
MM16 <- read.table("G:\\Stuff\\data\\MM16.txt")
MM16
x1 x2 x3 x4 x5   y
a  b  a  c  c    M1
c  b  b  c  c    M4
c  c  a  c  c    M2
c  a  c  a  a    M2
c  c  a  a  a    M1
c  a  b  c  a    M3
c  c  a  b  c    M3
c  a  c  a  b    M2
c  c  a  b  a    M1

How can I do it.
Thanks again for your help.
Jan Sabee

On 6/10/05, Henrik Bengtsson <hb at maths.lth.se> wrote:
> Open a connection a read line by line from that one, e.g.
> 
> myReadPrint <- function(pathname, ...) {
>    con <- file(pathname, open="r")
>    on.exit(close(con)) # Guarantees to close connection!
> 
>    count <- 0;
>    while(TRUE) {
>      line <- scan(con, sep="\t", nlines=1, fill=TRUE,
>                                         quiet=TRUE, what="raw");
>      # Alternatively, just...
>      # line <- readLines(con, n=1)
>      if (length(line) == 0)
>        break;
>      count <- count + 1;
>      cat("read row no ", count, ",\n", sep="");
>      print(line);
>    }
> }
> 
> See ?file for more details.
> 
> /Henrik
> 
> Clark Allan wrote:
> > use a loop associated with the scan function.
> >
> > for (i in 1:9)
> > {
> >
> > print(scan(file="c:/a.txt",sep="\t",skip=i,nlines=1,fill=T,quiet=T,what="raw"))
> > }
> >
> >
> > this works but there has to be a better solution
> >
> >
> >
> > Jan Sabee wrote:
> >
> >>Dear all,
> >>How to read a row dataset one by one and then print it.
> >>
> >>x1 x2 x3 x4 x5   y
> >>a  b  a  c  c    M1
> >>c  b  b  c  c    M4
> >>c  c  a  c  c    M2
> >>c  a  c  a  a    M2
> >>c  c  a  a  a    M1
> >>c  a  b  c  a    M3
> >>c  c  a  b  c    M3
> >>c  a  c  a  b    M2
> >>c  c  a  b  a    M1
> >>
> >>I need a result like
> >>read row no 1,
> >>[1] a  b  a  c  c    M1
> >>read row no 2,
> >>[1] c  b  b  c  c    M4
> >>.
> >>.
> >>.
> >>the last row,
> >>[1] c  c  a  b  a    M1
> >>
> >>Kind regards,
> >>Jan Sabee
> >>
> >>______________________________________________
> >>R-help at stat.math.ethz.ch mailing list
> >>https://stat.ethz.ch/mailman/listinfo/r-help
> >>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
> >>
> >>
> >>------------------------------------------------------------------------
> >>
> >>______________________________________________
> >>R-help at stat.math.ethz.ch mailing list
> >>https://stat.ethz.ch/mailman/listinfo/r-help
> >>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
> 
>