Thanks for showing me the link to the code / your response / your work in
general.

It seems that the real magic is happening in the call to the function
attributes, via the line
attr(x, "srcref")
I'm guessing that attributes must be defined somewhere deep inside the R
machinery (since I didn't find it as a file in base)...  And there's
probably not much benefit for me to know more beyond that.

So, I'll be looking forward to 2.13!


On Tue, Mar 15, 2011 at 3:37 PM, Duncan Murdoch <murdoch.duncan@gmail.com>wrote:

> On 15/03/2011 2:56 PM, Gene Leynes wrote:
>
>> The "getSrcFilename" function is exactly what I was trying to describe,
>> and
>> I'm excited to know that it's on it way!
>>
>> I have tried to create that type of function, but I didn't think it was
>> possible with currently available functions.  I would be interested in
>> seeing how the new function works, maybe I'll check it out using the
>> google
>> code search tool<
>> http://www.google.com/codesearch?hl=en&lr=&q=lang%3Ar+&sbtn=Search
>> >(although
>>
>> I usually have a hard time making sense of that code).
>>
>
> The source is available in
>
> https://svn.r-project.org/R/trunk/src/library/utils/R/sourceutils.R
>
> Duncan Murdoch
>
>
>  Please let me briefly clarify this part:
>>
>> >  But it can.  If you open a script and choose save, it will be saved to
>> the
>> >  same place.
>> >
>>
>> I just mean that when you do "save as..." R doesn't seem to use the same
>> information that it uses during a normal save (the directory or script
>> name).  In other applications like Microsoft Word, or Python's IDLE
>> (screen
>> shot attached) the user is shown a dialogue box with the file name in the
>> current directory of that file.
>>
>> This is a very minor annoyance though.  I only brought it up because I
>> thought it would be easier to explain than asking about a function that
>> would do the job of "getSrcFilename", which is really what I was after.
>>
>> I rarely upgrade my R versions, but this will definitely be an occasion
>> when
>> I do!
>>
>> This makes me want to go back and look at the past release notes to see
>> what
>> other goodies I've been overlooking.
>>
>> Thanks again,
>>
>> Gene
>>
>>
>>
>> On Mon, Mar 14, 2011 at 8:17 PM, Duncan Murdoch<murdoch.duncan@gmail.com
>> >wrote:
>>
>> >  On 11-03-14 8:12 PM, Gene Leynes wrote:
>> >
>> >>  Yes, I understand.  Normally I use Eclipse, which does what I want for
>> >>  "save as..."
>> >>
>> >>  The bigger issue is that R can't tell the location of an open script,
>> >>  which makes it harder to create new versions of existing work....
>> >>
>> >
>> >  But it can.  If you open a script and choose save, it will be saved to
>> the
>> >  same place.  Or do you mean an executing script?  There are indirect
>> ways to
>> >  find the name of the executing script.  For example,
>> >  in R-devel (to become 2.13.0 next month), you can do this:
>> >
>> >
>> >  cat("This file is ", getSrcFilename(function(){}, full=TRUE), "\n")
>> >
>> >  The getSrcFilename() function will be new in 2.13.0.  You can do the
>> same
>> >  in earlier versions, but you need to program it yourself.
>> >
>> >  Duncan Murdoch
>> >
>> >
>> >
>> >
>> >
>> >>  Say you have some great analysis going in "Research 2011-01-01" with a
>> >>  folder for data, code, gui, other languages, excel, whatever else.
>> >>
>> >>  Then you want to make a new folder for Research 2011-01-02" with the
>> >>  same structure.
>> >>
>> >>  Making sure that you're setting the right directory in the new version
>> >>  adds a layer of complexity which would be nice to avoid.  It would be
>> >>  really nice to just copy the folders, and let the script detect it's
>> own
>> >>  location so that it could read from the data sub-directory, the gui's
>> >>  sub-directory, etc.  What I want to be able to do is copy the tools I
>> >>  create into different client folders so that anyone can just use the
>> >>  tool without changing the source code.... which is simple for you or
>> I,
>> >>  but prevents newcomers from using the tools.
>> >>
>> >>  Apparently I'm in the minority on the next part: but the "save as"
>> thing
>> >>  I was describing before seems very strange to me.  As I teach new
>> people
>> >>  R it's always kind of a hangup that requires a little more
>> explanation,
>> >>  but maybe it's the way I'm looking at it.
>> >>
>> >>  Thanks for your reply Duncan.
>> >>
>> >>
>> >>  On Mon, Mar 14, 2011 at 6:57 PM, Duncan Murdoch
>> >>  <murdoch.duncan@gmail.com<mailto:murdoch.duncan@gmail.com>>  wrote:
>> >>
>> >>     On 11-03-14 5:03 PM, Gene Leynes wrote:
>> >>
>> >>         As much as I love R, there are still the occasional
>> shortcomings.
>> >>
>> >>         I would love to find a solution to the "save as..." problem.
>> >>
>> >>         Steps to reproduce the problem:
>> >>
>> >>             1. Open any version of he R GUI in Windows
>> >>             2. Choose "File>   Open" from the menu
>> >>             3. Open a script that is in a different directory
>> >>             4. Choose "File>   Save As" from the menu
>> >>
>> >>
>> >>         In just about any other application you would be presented with
>> >>         a GUI
>> >>         showing the current folder of the script and the current name
>> of
>> >>  the
>> >>         script.  You could then edit the name and save.
>> >>
>> >>         In R, you have to find the directory of the script and the
>> >>         script name.  It
>> >>         can be annoying from a GUI perspective, especially if you
>> >>         typically work in
>> >>         one directory and store your scripts somewhere else, and the
>> >>         problem is
>> >>         worse when you have many script versions or directories.
>> >>
>> >>         I know there are many ways to work around this issue.
>> >>         I also know about the batch file project.
>> >>
>> >>         However, it seems like this is something that users shouldn't
>> >>         *need* to work
>> >>         around.
>> >>
>> >>         I think this is related to the fact that R has no way of
>> knowing
>> >>  the
>> >>         location of any open script file.
>> >>         (Please correct me if I'm wrong about that last part! )
>> >>
>> >>         I think this has come up before, but I couldn't find it in my
>> >>         searches.
>> >>         Is this a problem for other users as well?
>> >>         Should I post this to the development list?
>> >>         Is this change known to be possible / impossible?
>> >>         Can I help make the change?
>> >>
>> >>
>> >>     I think it's simply a matter of different working patterns.  R
>> >>     offers the current working directory to save into.  For some
>> people,
>> >>     that's fine.  Others (like you) want some other default.
>> >>
>> >>     I don't think we want to make the editor so elaborate that it
>> caters
>> >>     to every taste.  If you want a better editor, there are lots out
>> >>     there, including several that have good integration with R (Emacs,
>> >>     Eclipse, WinEdt, TinnR, etc.)  I think it would be best to use one
>> >>     of those editors, customized to suit your needs.
>> >>
>> >>     Duncan Murdoch
>> >>
>> >>
>> >>         Thanks
>> >>
>> >>         Gene
>> >>
>> >>                 [[alternative HTML version deleted]]
>> >>
>> >>         ______________________________________________
>> >>         R-help@r-project.org<mailto: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.
>> >>
>> >>
>> >>
>> >>
>> >
>>
>>
>

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