GNU bug report logs - #10554
24.0.92; No units specified (dimensionless quantities in Emacs Calc)

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: "Roland Winkler" <winkler <at> gnu.org>
Subject: bug#10554: closed (Re: bug#10554: 24.0.92; No units specified
 (dimensionless quantities in Emacs Calc))
Date: Sat, 21 Jan 2012 04:23:02 +0000

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Your bug report

#10554: 24.0.92; No units specified (dimensionless quantities in Emacs Calc)

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 10554 <at> debbugs.gnu.org.

-- 
10554: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=10554
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Jay Belanger <jay.p.belanger <at> gmail.com>
To: 10554-done <at> debbugs.gnu.org
Cc: jay.p.belanger <at> gmail.com
Subject: Re: bug#10554: 24.0.92;
	No units specified (dimensionless quantities in Emacs Calc)
Date: Fri, 20 Jan 2012 22:21:59 -0600

> In Calc type
>
> 'e T m^2 / hbar
>
> Convert this to SI units with u c si RET
> - That's perfect. We get a dimensionless number.
> Let's try again. In Calc type (more my range of numbers)
>
> 'e T nm^2 / hbar
>
> Now when we type again u c, Calc remembers what we did before.
> So as a unit it offers "default 1". Let's take this default.
> So just type RET
>
> Error: No units specified
>
> In other words: if an expression with units simplifies to a
> dimensionless number, Calc does not accept the unit "1", though it
> even offers this unit as a default for calc-convert-units.

The version of Calc in bzr Emacs will no longer offer "1" as a default.

[Message part 3 (message/rfc822, inline)]

From: "Roland Winkler" <winkler <at> gnu.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.0.92; No units specified (dimensionless quantities in Emacs Calc)
Date: Wed, 18 Jan 2012 23:24:41 -0600

In Calc type

'e T m^2 / hbar

Convert this to SI units with u c si RET
- That's perfect. We get a dimensionless number.
Let's try again. In Calc type (more my range of numbers)

'e T nm^2 / hbar

Now when we type again u c, Calc remembers what we did before.
So as a unit it offers "default 1". Let's take this default.
So just type RET

Error: No units specified

In other words: if an expression with units simplifies to a
dimensionless number, Calc does not accept the unit "1", though it
even offers this unit as a default for calc-convert-units.


In GNU Emacs 24.0.92.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.20.1)
 of 2011-12-14 on regnitz
Windowing system distributor `The X.Org Foundation', version 11.0.10706000

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