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From: Michael Heerdegen <michael_heerdegen@HIDDEN>
To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN>
Subject: Re: bug#44799: 28.0.50; Calc: Meter not printed as \text in latex
output
References: <E3B1C9A2-C05B-462E-96E0-F554EC63B2B0@HIDDEN>
<87mtz9cd06.fsf@HIDDEN> <732F118E-0110-4CE2-8900-C64E06D78A04@HIDDEN>
Date: Mon, 23 Nov 2020 13:16:21 +0100
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Mattias Engdeg=C3=A5rd <mattiase@HIDDEN> writes:
> A serious reform seems unlikely unless someone really is willing to do
> the work. More realistic might be adding a way to tell Calc which
> variables you want to have typeset as units, as this can vary from
> person to person and time to time.
Would it be possible to make output syntax depend on how the symbol is
actually interpreted by Calc in the given context?
> > BTW, do you know (Bug#30231) why allowed characters in units are
> > restricted?
>
> No idea, but isn't it just the restriction of variable symbols in
> general?
You mean, in Calc? Then I wonder why we have that restriction.
Regards,
Michael.
bug-gnu-emacs@HIDDEN:bug#44799; Package emacs.
Full text available.Received: (at 44799) by debbugs.gnu.org; 23 Nov 2020 10:26:15 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Nov 23 05:26:15 2020 Received: from localhost ([127.0.0.1]:49152 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1kh931-0006Sv-6u for submit <at> debbugs.gnu.org; Mon, 23 Nov 2020 05:26:15 -0500 Received: from mail1449c50.megamailservers.eu ([91.136.14.49]:57230 helo=mail265c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1kh92v-0006Sb-Ry for 44799 <at> debbugs.gnu.org; Mon, 23 Nov 2020 05:26:14 -0500 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1606127163; bh=nNZXrr+usaWHbReeFDfyDkC578ccxWdKm1atHKa8/hs=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=qzgH5bA1/2i219s0lAJTt48fRh1Yk0bK+1WCo2ZA5SPmLxd+nqqs/I84HNqyYxdT5 6h6d2uZyKCDlQ76uqT1xW9cwUq59DHcmDrFH0E3exCyv0ZnAZp3Fs4ODzmn12RZJmZ hlL8bmVialEyJ53nhzZN6m3OgfFiuGN1WrNQ0zqs= Feedback-ID: mattiase@HIDDEN Received: from stanniol.lan (c-064ae655.032-75-73746f71.bbcust.telenor.se [85.230.74.6]) (authenticated bits=0) by mail265c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 0ANAQ1B3014128; Mon, 23 Nov 2020 10:26:02 +0000 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.17\)) Subject: Re: bug#44799: 28.0.50; Calc: Meter not printed as \text in latex output From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <87mtz9cd06.fsf@HIDDEN> Date: Mon, 23 Nov 2020 11:26:00 +0100 Content-Transfer-Encoding: quoted-printable Message-Id: <732F118E-0110-4CE2-8900-C64E06D78A04@HIDDEN> References: <E3B1C9A2-C05B-462E-96E0-F554EC63B2B0@HIDDEN> <87mtz9cd06.fsf@HIDDEN> To: Michael Heerdegen <michael_heerdegen@HIDDEN> X-Mailer: Apple Mail (2.3445.104.17) X-CTCH-RefID: str=0001.0A782F22.5FBB8E3B.004E, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: 0.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=VaOJw2h9 c=1 sm=1 tr=0 a=Ni+dBsiEfW2GqKMPYZim9A==:117 a=Ni+dBsiEfW2GqKMPYZim9A==:17 a=IkcTkHD0fZMA:10 a=M51BFTxLslgA:10 a=NoirPxP4FYxAGmrsBmkA:9 a=QEXdDO2ut3YA:10 X-Origin-Country: SE X-Spam-Score: 0.4 (/) X-Debbugs-Envelope-To: 44799 Cc: 44799 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) 22 nov. 2020 kl. 22.12 skrev Michael Heerdegen = <michael_heerdegen@HIDDEN>: > Ah, so there can be a variable and a unit of the same name at the same > time? I can s s a variable "m". Is it good to allow this? I mean = it's > good that meters is "m" as expected but if someone wants to use "m" as = a > variable in the same formula it necessarily gets ugly. Given the number of units, it seems difficult to disallow using the same = symbols as variables. Many innocent-looking single-letter names are = units: s, N, m, A, V, W, J, g, l, ... For instance, 'e' both has a value (2.7something) and is a unit = (electron charge). Variables in Calc include not only names having an assigned concrete = value, but also variables in the wider mathematical sense since Calc is = capable of some symbolic computing. Units of measurement just use the = same mechanism and are treated as any other variables in all computation = except for operations explicitly related to units such as 'u s'. A serious reform seems unlikely unless someone really is willing to do = the work. More realistic might be adding a way to tell Calc which = variables you want to have typeset as units, as this can vary from = person to person and time to time. > BTW, do you know (Bug#30231) why allowed characters in units are > restricted? No idea, but isn't it just the restriction of variable symbols in = general? Unless they already play some syntactic role I suppose we could = be more permissive. Currency symbols like =E2=82=AC, =C2=A5 and $ appear = to be of special interest, but $ already has a special meaning.
bug-gnu-emacs@HIDDEN:bug#44799; Package emacs.
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From: Michael Heerdegen <michael_heerdegen@HIDDEN>
To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN>
Subject: Re: bug#44799: 28.0.50; Calc: Meter not printed as \text in latex
output
References: <E3B1C9A2-C05B-462E-96E0-F554EC63B2B0@HIDDEN>
Date: Sun, 22 Nov 2020 22:12:09 +0100
In-Reply-To: <E3B1C9A2-C05B-462E-96E0-F554EC63B2B0@HIDDEN> ("Mattias
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Mattias Engdeg=C3=A5rd <mattiase@HIDDEN> writes:
> It seems to be a heuristic for distinguishing units from variables,
> both of which unfortunately have the same representation in Calc. We
> could make it more precise by looking in the unit table (and allow for
> prefixes), but it would mean that a variable 'm' would always look
> like a unit. I'm afraid I have no other good solution at hand.
Ah, so there can be a variable and a unit of the same name at the same
time? I can s s a variable "m". Is it good to allow this? I mean it's
good that meters is "m" as expected but if someone wants to use "m" as a
variable in the same formula it necessarily gets ugly.
> For that matter, shouldn't units use \mathrm{} rather than \text{} ?
I dunno. latex language mode has several submodes (see
`calc-latex-language'), but none of them uses that.
BTW, do you know (Bug#30231) why allowed characters in units are
restricted?
Thanks,
Michael.
bug-gnu-emacs@HIDDEN:bug#44799; Package emacs.
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Subject: bug#44799: 28.0.50; Calc: Meter not printed as \text in latex output
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Content preview: It seems to be a heuristic for distinguishing units from
variables,
both of which unfortunately have the same representation in Calc. We could
make it more precise by looking in the unit table (and al [...]
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It seems to be a heuristic for distinguishing units from variables, both =
of which unfortunately have the same representation in Calc. We could =
make it more precise by looking in the unit table (and allow for =
prefixes), but it would mean that a variable 'm' would always look like =
a unit. I'm afraid I have no other good solution at hand.
For that matter, shouldn't units use \mathrm{} rather than \text{} ?
bug-gnu-emacs@HIDDEN:bug#44799; Package emacs.
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Subject: 28.0.50; Calc: Meter not printed as \text in latex output
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Hello,
in Calc, C-u d L to switch to latex language with \text{} printed units.
`min' for example is then printed "\text{min}" but (bug) Meter still
"m". AFAIU, the printing code assumes that any unit has at least two
characters, which is obviously not the case for some units.
TIA,
Michael.
In GNU Emacs 28.0.50 (build 3, x86_64-pc-linux-gnu, GTK+ Version 3.24.23, cairo version 1.16.0)
of 2020-11-22 built on drachen
Repository revision: ce5458fe6eeb37df37119d04228ac7fcd5d39236
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Debian GNU/Linux bullseye/sid
Michael Heerdegen <michael_heerdegen@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#44799; Package emacs.
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