[R] filename of source file

[Andrew C. Ward]

If you use the chdir argument to source(), this will tell your .r file to
work in that directory (including writing output to files). For example,
if you have a file called test.r in c:/tmp that contains the commands
        my.test <- sample(1:5, 100, replace=TRUE)
        write.table(my.test, "test.out")
you can call it using
        > source("c:/temp/test.r", chdir=TRUE)
after which there will be a file in c:/temp called test.out.

Does this achieve what you want?


Regards,

Andrew C. Ward

CAPE Centre,
The University of Queensland
Brisbane Qld 4072 Australia
andreww at cheque.uq.edu.au

----- Original Message -----
From: David Richmond <daver969 at mac.com>
To: Andrew C. Ward <andreww at cheque.uq.edu.au>
Cc: <r-help at hypatia.math.ethz.ch>
Sent: Monday, August 05, 2002 3:25 PM
Subject: Re: [R] filename of source file


> Yes, source refers to the use of the source() function. Suppose I invoke
> a file like so:
>
> source("/path/name/filename.r")
>
> I want to insert a command in filename.r like so:
>
> fullpath <- magic_command()
>
> such that fullpath is now "/path/name/filename.r"
>
> In other words, I want filename.r to be able to figure out where it is,
> regardless of where I put it, so that it can save all its output in the
> same directory.
>
> dave r
>
>
> On Sunday, August 4, 2002, at 10:09 PM, Andrew C. Ward wrote:
>
> > Dave,
> >
> > You may like to give an example usage since I'm not 100% sure what you
> > wish
> > to achieve. Does "current source" refer to the source() command, to
> > read.table(),
> > or to something else?
> >
> > You may like to create a variable save.dir in your .Rprofile or in your
> > working
> > session that points to the folder you want everything saved in.
> >
> > Regards,
> >
> > Andrew C. Ward
> >
> > CAPE Centre,
> > The University of Queensland
> > Brisbane Qld 4072 Australia
> > andreww at cheque.uq.edu.au
> >
> > ----- Original Message -----
> > From: David Richmond <daver969 at mac.com>
> > To: <r-help at stat.math.ethz.ch>
> > Sent: Monday, August 05, 2002 12:31 PM
> > Subject: [R] filename of source file
> >
> >
> >> Hi
> >> Is there a command which will return the complete pathname of the
> >> file from which the current source is being read? I want something
> >> which
> >> can be inserted into any .r file and it will be able to ascertain
> >> exactly where it is, so that it can save data to the same directory, no
> >> matter where it is, regardless of what the current working directory
> >> is.
> >>
> >> Dave Richmond
> >> daver969 at mac.com
> >> ------------------------------------------------------
> >> "It works on a complex scientific principle
> >> known as pot luck." - The Doctor
> >>
>
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> >>
>

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