[R] paste argument of a function as a file name

[Barry Rowlingson]

Luis Ridao Cruz wrote:
> R-help,
> 
> I have a function which is exporting the output to a file via
> write.table(df, file =  "file name.xls" )
> 
> What I want is to paste the file name (above) by taking the argument to
> the function as a file name 
> 
> something like this:

  More like this:

foo = function(df){
  fn=paste(deparse(substitute(df)),'.xls',sep='')
  write.table(df,file=fn)
}

Then:

  x=1:10
  foo(x)

produces a file: x.xls

  deparse(substitute(df)) is used in plot() to label the Y-axis with the 
name of the object passed to plot(), which is similar to what you want 
to do here.

Baz