thank you all. it seems what='' can works while what = " " does not .:)
thank you all.
2012/3/7 kees duineveld <kees.duinev...@gmail.com>
> Hi Jie,
>
> Are you looking for this construction?
>
> mydata <- apply(c("H20100902.TXT", "H20100903.TXT" ,"H20100904.TXT"
> ,"H20100905.TXT", "H20100906.TXT",
> "H20100907.TXT","H20100908.TXT"),function(x) scan(x, other options))
>
> Kees
>
> On Wed, Mar 7, 2012 at 3:44 PM, Jie Tang <totang...@gmail.com> wrote:
> > there is something wrong :
> >
> > scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings, :
> > scan() needs 'a real', but not 'H20100903.TXT'
> >
> > 2012/3/7 jim holtman <jholt...@gmail.com>
> >
> >> This works fine for me; look at your options on 'scan':
> >>
> >>
> >> > x <- scan(text = "H20100902.TXT
> >> + H20100903.TXT
> >> + H20100904.TXT
> >> + H20100905.TXT
> >> + H20100906.TXT
> >> + H20100907.TXT
> >> + H20100908.TXT", what = '')
> >> Read 7 items
> >> > cat(x, file = 'file.txt', sep = '\n') # create the 'file.txt'
> >> >
> >> > files <- scan('file.txt', what = '') # read names from the file
> >> Read 7 items
> >> > files # display the names
> >> [1] "H20100902.TXT" "H20100903.TXT" "H20100904.TXT" "H20100905.TXT"
> >> "H20100906.TXT"
> >> [6] "H20100907.TXT" "H20100908.TXT"
> >> >
> >>
> >>
> >> On Wed, Mar 7, 2012 at 8:49 AM, Jie Tang <totang...@gmail.com> wrote:
> >> > hi everyone .
> >> > I have a group of files that needs to be read in .
> >> > And I put their filename into one file with the name "file.txt"
> >> >
> >> > And in the file.txt,the filename are shown as below :
> >> > H20100902.TXT
> >> > H20100903.TXT
> >> > H20100904.TXT
> >> > H20100905.TXT
> >> > H20100906.TXT
> >> > H20100907.TXT
> >> > H20100908.TXT
> >> >
> >> > Now I want to read these file from the file.txt by such codes:
> >> >
> >> >
> >> > filename <-("file.txt")
> >> >
> >> > pp <- scan(filename,what=list(""),sep=" ")
> >> >
> >> > but R shows that :
> >> >> pp
> >> > [[1]]
> >> >
> >> > that is pp is just one dimension data?
> >> >
> >> > but when I type
> >> >>pp[1]
> >> > the filenames are shown.
> >> >
> >> > How could I read these filenames into one array
> >> > and so that .I can read the data by such a command ?
> >> >
> >> > ddata<-scan(pp[2],what=datalist,na.strings = 999)
> >> >
> >> > thank you .
> >> > --
> >> > TANG Jie
> >> > Email: totang...@gmail.com
> >> > Tel: 0086-2154896104
> >> > Shanghai Typhoon Institute,China
> >> >
> >> > [[alternative HTML version deleted]]
> >> >
> >> > ______________________________________________
> >> > R-help@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.
> >>
> >>
> >>
> >> --
> >> Jim Holtman
> >> Data Munger Guru
> >>
> >> What is the problem that you are trying to solve?
> >> Tell me what you want to do, not how you want to do it.
> >>
> >
> >
> >
> > --
> > TANG Jie
> > Email: totang...@gmail.com
> > Tel: 0086-2154896104
> > Shanghai Typhoon Institute,China
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help@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.
>
--
TANG Jie
Email: totang...@gmail.com
Tel: 0086-2154896104
Shanghai Typhoon Institute,China
[[alternative HTML version deleted]]
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