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* [babel] R questions
@ 2009-12-04 22:31 Sébastien Vauban
  2009-12-05  0:45 ` Dan Davison
  0 siblings, 1 reply; 8+ messages in thread
From: Sébastien Vauban @ 2009-12-04 22:31 UTC (permalink / raw)
  To: emacs-orgmode-mXXj517/zsQ

Hello,

One of this questions is a bit border-line, but I'm still trying ;-)

I have this table generated by a script:

--8<---------------cut here---------------start------------->8---
#+results: abc2008
| "2008/1"  | -78.59 |   1627.24 |
| "2008/2"  | -80.17 |    700.33 |
| "2008/3"  | -80.17 |     879.8 |
| "2008/4"  | -80.17 | -25823.17 |
| "2008/5"  | -80.17 |   3570.75 |
| "2008/6"  | -81.77 |    2377.8 |
| "2008/7"  | -81.77 |    2889.4 |
| "2008/8"  | -81.77 |   2612.92 |
| "2008/9"  | -81.77 |   1585.21 |
| "2008/10" |  -83.4 |   1561.42 |
| "2008/11" |  -83.4 |   2189.17 |
| "2008/12" |     "" |        "" |
--8<---------------cut here---------------end--------------->8---

I want to draw the 12 months with the values side by side.

Problem #1: the "" in the last line hinder the generation of the graph. Format
error.

--8<---------------cut here---------------start------------->8---
#+srcname: expenses-bar-plot(abc = abc2008)
#+begin_src R :results file :file abc2008.pdf
    barplot(abc[,3], col = "red", main = "Profit and Loss 2008", las = 1, xlab
    = "Months", ylab = "EUR")
#+end_src
--8<---------------cut here---------------end--------------->8---

Problem #2: I don't know how to ask for drawing the 2 columns. I've tried
putting the arguments in a list, I've tried `cbind' (as read in one of the Org
papers), nothing made it. This is the border-line question.

The first one (at least) merits an answer, as it's a generic problem on
handling empty results. Is there some spec to consider empty result equivalent
to empty strings or to 0. How can we set it to be 0, here, instead of ""?  I
guess it's that the problem for R.

Best regards,
  Seb

-- 
Sébastien Vauban



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^ permalink raw reply	[flat|nested] 8+ messages in thread
* Re: Re: [babel] R questions
@ 2009-12-08 22:40 Thomas S. Dye
  2009-12-09  9:04 ` Sébastien Vauban
  0 siblings, 1 reply; 8+ messages in thread
From: Thomas S. Dye @ 2009-12-08 22:40 UTC (permalink / raw)
  To: emacs-orgmode list


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Hi Sebastien,

On Dec 8, 2009, at 11:37 AM, Sébastien Vauban wrote:

> Hi Thomas,
>
> "Thomas S. Dye" wrote:
>> On Dec 7, 2009, at 11:50 PM, Sébastien Vauban wrote:
>>
>>>> [2] I guess one could potentially think about dealing with  
>>>> missing values
>>>>    more explicitly in org-babel. E.g. there could be a header arg
>>>>    specifying what values are to be treatyed as missing. Nothing  
>>>> like
>>>>    that exists currently.
>>>
>>> I guess such a feature would be required on the long term. Of  
>>> course, even
>>> specifying what would be the needed behavior is already difficult,  
>>> I think.
>>> One must have good knowledge of the multiple languages and  
>>> environments,
>>> and try to abstract the best behavior out of these.
>>>
>>> Side note -- I know, for example, that there is an option in  
>>> Access to let
>>> it consider the empty string ('') as the NULL value, or not. Clear.
>>>
>>> But what's a "NA" value in general?  Is 0 always a meaningful  
>>> value as
>>> numeric?  Context-sensitive..
>>
>> NA is a logical constant of length 1 which contains a missing value
>> indicator. Whether or not 0 is a meaningful value as numeric  
>> depends on your
>> data and the questions you are asking of it. You don't ask this  
>> question,
>
> ?  I thought I addressed that when asking (to myself) "Is 0 always a
> meaningful value as numeric?" and answering [that it certainly is]
> "context-sensitive.."
>
>
>> but if I read this thread correctly and you are trying to  
>> workaround a data
>> input problem with R in Org-babel,
>
> No, you misread, or I mis-wrote ;-)
>
> I wasn't speaking of R only, saying that "such a feature would be  
> required on
> the long term [... for] the multiple languages".
>
> Thinking at shell-script (with empty strings), SQL code (with empty  
> strings
> and NULL values), etc.
>
>
>> then replacing missing values with 0 in a numeric context to get  
>> around the
>> Org-babel problem is NOT a good idea.
>
> Implementing a fixed interpretation is NOT a good idea. I share your  
> point of
> view.
>
> My comments were:
>
> - I think we must be able to write a rule for interpreting  
> "empty" (whatever
>  it means) values;
>
> - We should think at what's needed to cover the current and future  
> needs, not
>  focusing on one specific language (R), but thinking at all of them  
> (shell
>  commands, SQL, etc.).
>
> Best regards,
>  Seb
>
> -- 
> Sébastien Vauban

I agree with you on the importance of having some way to represent  
missing values in Org-babel that can be translated cleanly and  
transparently to the representations used by specific languages.

I was responding to one part of your longer message in the context of  
the message subject, "R questions."  I see now that you were asking a  
more general question.  Mea culpa.

All the best,
Tom

Thomas S. Dye, Ph.D.
T. S. Dye & Colleagues, Archaeologists, Inc.
Phone: (808) 529-0866 Fax: (808) 529-0884
http://www.tsdye.com


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^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2009-12-09  9:04 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2009-12-04 22:31 [babel] R questions Sébastien Vauban
2009-12-05  0:45 ` Dan Davison
2009-12-08  9:50   ` Sébastien Vauban
2009-12-08 16:00     ` Thomas S. Dye
2009-12-08 21:37       ` Sébastien Vauban
2009-12-08  9:58   ` Sébastien Vauban
2009-12-08 16:26     ` Dan Davison
  -- strict thread matches above, loose matches on Subject: below --
2009-12-08 22:40 Thomas S. Dye
2009-12-09  9:04 ` Sébastien Vauban

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