[R] input data file

[jim holtman]

You don't have to name them after numbers.  What I sent was just an
example of a character vector with file names.  If you have all the
files in a directory, then you can set the loop to read in all the
files (or selected one based on a pattern match).  If you are
copy/pasting the 'scan' command, then you must somehow be changing the
file name that is being read and the R object that you are storing the
values in.

You can use list.files(pattern="..") to select a list of file names.
This is much easier than copy/paste.

On 8/8/07, Tiandao Li <Tiandao.Li at usm.edu> wrote:
> I thought of loop at first. My data were generated from 32 microarray
> experiments, each had 3 replicates, 96 files in total. I named the files
> based on different conditions or time series, and I really won't want to
> name them after numbers. It will make me confused later when I need to
> refer/compare them.
>
>
> On Tue, 7 Aug 2007, jim holtman wrote:
>
> I would hope that you don't have 100 'scan' statements; you should
> just have a loop that is using a set of file names in a vector to read
> the data.  Are you reading the data into separate objects?  If so,
> have you considered reading the 100 files into a 'list' so that you
> have a single object with all of your data?  This is then easy to save
> with the 'save' function and then you can quickly retrieve it with the
> 'load' statement.
>
> file.names <- c('file1', ..., 'file100')
> input.list <- list()
> for (i in file.names){
>    input.list[[i]] <- scan(i, what=....)
> }
>
> You can then 'save(input.list, file='save.Rdata')'.  You can access
> the data from the individual files with:
>
> input.list[['file33']]
>
>
>
>
>
> On 8/7/07, Tiandao Li <Tiandao.Li at usm.edu> wrote:
> > In the first part of myfile.R, I used scan() 100 times to read data from
> > 100 different tab-delimited files. I want to save this part to another
> > data file, so I won't accidently make mistakes, and I want to re-use/input
> > it like infile statement in SAS or \input(file.tex} in latex. Don't want
> > to copy/paste 100 scan() every time I need to read the same data.
> >
> > Thanks!
> >
> > On Tue, 7 Aug 2007, jim holtman wrote:
> >
> > If you are going to read it back into R, then use 'save'; if it is
> > input to another applicaiton, consider 'write.csv'.  I assume that
> > when you say "save all my data files" you really mean "save all my R
> > objects".
> >
> > On 8/7/07, Tiandao Li <Tiandao.Li at usm.edu> wrote:
> > > Hello,
> > >
> > > I am new to R. I used scan() to read data from tab-delimited files. I want
> > > to save all my data files (multiple scan()) in another file, and use it
> > > like infile statement in SAS or \input{tex.file} in latex.
> > >
> > > Thanks!
> > >
> > > ______________________________________________
> > > 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
> > > and provide commented, minimal, self-contained, reproducible code.
> > >
> >
> >
> > --
> > Jim Holtman
> > Cincinnati, OH
> > +1 513 646 9390
> >
> > What is the problem you are trying to solve?
> >
>
>
> --
> Jim Holtman
> Cincinnati, OH
> +1 513 646 9390
>
> What is the problem you are trying to solve?
>


-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?