From: Nick Dokos <ndokos@gmail.com>
To: emacs-orgmode@gnu.org
Subject: Re: R code block produces only partial output
Date: Tue, 05 Aug 2014 16:10:34 -0400 [thread overview]
Message-ID: <87iom6snnp.fsf@alphaville.bos.redhat.com> (raw)
In-Reply-To: 87mwbiso9m.fsf@alphaville.bos.redhat.com
Nick Dokos <ndokos@gmail.com> writes:
> John Hendy <jw.hendy@gmail.com> writes:
>
>> On Tue, Aug 5, 2014 at 2:02 PM, Eric Schulte <schulte.eric@gmail.com> wrote:
>>> Charles Berry <ccberry@ucsd.edu> writes:
>>>
>>>> Eric Schulte <schulte.eric <at> gmail.com> writes:
>>
>> [snip]
>>
>>>> Eric,
>>>>
>>>> As noted by Andreas and John this is a problem for session output.
>>>>
>>>> org-babel-R-evaluate-session uses
>>>>
>>>> (string-match "^\\([ ]*[>+\\.][ ]?\\)+\\([[0-9]+\\|[ ]\\)" line)
>>>>
>>>> to find the start of R output in the session.
>>>>
>>>> This does not match the ` 0', but matches the ` .6'
>>>> in the output you show above, so if that had been in a session, all the
>>>> output up to and including the '.' before the '6' would be clipped
>>>> by the following
>>>>
>>>> (substring line (match-end 1))
>>>>
>>>>
>>>> as Andreas output showed.
>>>>
>>>> Deleting the "\\." fixes Andreas case, but what are the circumstances
>>>> requiring the "\\." ?
>>>>
>>>
>>> I don't know.
>>
>> I'm not sure either, but was curious if someone could translate the
>> regex into "plain language." Maybe I could observe some typical
>> outputs and chime in since I use R regularly? From noob-level regex
>> stuff, it's looking for a new line followed by some number of spaces,
>> a ">" and at least one period and numbers?
>>
>
> It says[fn:1]
>
> ^ anchor the match at the beginning of the line
>
> \\([ ]*[>+\\.][ ]?\\)+ match any number of spaces followed by one of
> the three characters >, + or . (a literal
> period) followed by 0 or 1 space. If there is
> a match, remember what is matched as group 1
> (that's what the escaped parentheses
> \\(...\\) do). Match one or more of these
> (that's what the + at the end does).
>
> \\([[0-9]+\\|[ ]\\) match either an emtpy space or a sequence
> of one or more of the characters [ or 0-9
> i.e. an opening square bracket or a digit.
> remember what is matched as group 2.
>
> The latter will match [0[1[2[3 e.g. which does not sound right.
>
> The best way to find out what a regexp will match is to start with
> a buffer containing example strings that you are trying to match
> and example string that you are trying *not* to match, then invoke
>
> M-x regexp-builder
>
> and paste the regexp inside the empty set of quotes, then check the highligted
> matches to see if they agree with your expectations.
>
> Footnotes:
>
> [fn:1] Crossing fingers and toes, hoping I've got it right...
Bah, got it wrong: backslash is not special within a character class, so
[>+\\.]
matches > or + or \ or . (a period - which is also not special in a
character class).
I'm not sure what the regexp is supposed to match, but I'm almost sure
that it is wrong :-)
--
Nick
next prev parent reply other threads:[~2014-08-05 20:11 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-04 11:18 R code block produces only partial output Andreas Kiermeier
2014-08-04 11:53 ` Eric Schulte
2014-08-04 12:23 ` Andreas Kiermeier
2014-08-04 13:10 ` Eric Schulte
2014-08-05 0:46 ` Andreas Kiermeier
2014-08-05 4:00 ` John Hendy
2014-08-05 4:31 ` Andreas Kiermeier
2014-08-05 18:05 ` Charles Berry
2014-08-05 19:02 ` Eric Schulte
2014-08-05 19:11 ` John Hendy
2014-08-05 19:57 ` Nick Dokos
2014-08-05 20:10 ` Nick Dokos [this message]
2014-08-05 22:21 ` Charles C. Berry
2014-08-06 3:32 ` Aaron Ecay
2014-08-06 11:30 ` Eric Schulte
2014-08-07 6:00 ` Aaron Ecay
2014-08-07 17:42 ` Charles C. Berry
2014-08-07 18:06 ` Aaron Ecay
2014-08-07 18:42 ` Charles C. Berry
2014-08-07 19:06 ` Thomas S. Dye
2014-08-09 8:54 ` Rainer M Krug
2014-08-16 5:05 ` Aaron Ecay
2014-08-16 18:50 ` Charles C. Berry
2014-08-16 20:58 ` Aaron Ecay
2014-08-17 6:03 ` Achim Gratz
2014-08-19 0:13 ` Aaron Ecay
2014-08-19 5:36 ` Achim Gratz
2014-08-23 8:32 ` Aaron Ecay
2014-08-23 9:24 ` Andreas Kiermeier
2014-08-23 17:10 ` Aaron Ecay
2014-08-23 18:35 ` Thomas S. Dye
2014-08-23 19:37 ` Ista Zahn
2014-08-24 0:10 ` Charles C. Berry
2014-08-28 5:24 ` Aaron Ecay
2014-09-01 5:00 ` Aaron Ecay
2014-09-01 16:08 ` Charles C. Berry
2014-08-09 8:48 ` Rainer M Krug
2014-08-06 1:11 ` Andreas Kiermeier
2014-08-06 2:21 ` Charles C. Berry
2014-08-06 3:24 ` Aaron Ecay
2014-08-06 15:59 ` Charles C. Berry
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