[R] renaming an object
Torsten Hothorn
Torsten.Hothorn at rzmail.uni-erlangen.de
Mon Oct 16 08:39:43 CEST 2000
>
> Say I have a file called exp.batch which contains 2 cols
> The first col contains names of R objects the user would like to use.
> The second col contains the file names which will be read in using
> read.table
> i.e. exp.batch may look like this.....
>
> name1 complex/filename/path1.txt
> name2 complex/filename/path2.txt
> name3 complex/filename/path3.txt
> name4 complex/filename/path4.txt
>
> I want to have a function which will read in the files and make them into
> the objects named in the 1st column - automatically (by just providing
> exp.batch)
>
for the setup above (a simple numbering of files) I would use paste:
datname <- paste("name", 1:4, sep="")
filename <- paste("mypath/file", 1:4, sep="")
data <- list()
for (i in filename)
data <- c(data, read.table(file=i))
names(data) <- datname
data$name1 gives access to the data of file "file1"
Torsten
> for(i in 1:nrow(exp.batch)){
> tmp<-read.table(as.name(exp.batch[i,2]),...)
> ##
> ##But now I really want tmp to be as.name(exp.batch[i,1])???
> ## so that I can call the data from complex/filename/path1.txt
> ## by typing name1
> }
> In the end I should have objects name1, name2, name3, name4
> which are the names stored in the 1st column of exp.batch
>
> The basic idea is having to avoid typing out all this!
>
> name1<-read.table("file1",....)
> name2<-read.table("file2",....)
> ..
> ..
> ..
> nameN<-read.table("fileN",...)
>
> Does anyone have any suggestions?
>
> Thanks in advance,
>
> Natalie
>
>
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