From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: Getting used to Calc's Radian convention Date: Fri, 12 Sep 2014 21:15:03 +0200 Organization: Aioe.org NNTP Server Message-ID: <87bnqklkg8.fsf@debian.uxu> References: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1410549325 30654 80.91.229.3 (12 Sep 2014 19:15:25 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 12 Sep 2014 19:15:25 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Sep 12 21:15:21 2014 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1XSWJT-0001Kt-6d for geh-help-gnu-emacs@m.gmane.org; Fri, 12 Sep 2014 21:15:19 +0200 Original-Received: from localhost ([::1]:46980 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XSWJS-0003HB-Kn for geh-help-gnu-emacs@m.gmane.org; Fri, 12 Sep 2014 15:15:18 -0400 Original-Path: usenet.stanford.edu!news.tele.dk!news.tele.dk!small.news.tele.dk!newsfeed.xs4all.nl!newsfeed1a.news.xs4all.nl!xs4all!news.stack.nl!aioe.org!.POSTED!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 41 Original-NNTP-Posting-Host: P0uMB9BthHuWo8+BJXB4Mw.user.speranza.aioe.org Original-X-Complaints-To: abuse@aioe.org User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) X-Notice: Filtered by postfilter v. 0.8.2 Cancel-Lock: sha1:4xKfJmX9cHzdlvnrFaVeM12n0zE= Mail-Copies-To: never Original-Xref: usenet.stanford.edu gnu.emacs.help:207586 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:99861 Archived-At: dieter@duenenhof-wilhelm.de (H. Dieter Wilhelm) writes: > Calc's unit convention of revolution per minute (rpm) > is derived from the angular speed and not from a > frequency. One does not need to type the factor of `2 > pi' when calculating, for example, the > circumferential velocity from the radius and some > value in rpm. So far so good. > > But it has the slight aesthetic drawback that now the > velocity turns out to be in units of radians. > > n <- 1 rpm > r <- 1 m > n r -> 2 pi rad m / min > > Since Radian is a base unit I can only get rid of it > when dividing by `rad'. But I think a Radian is not a > real physical unit and wouldn't it be consistent, > when evaluating, to assign just the value of 1 to it? > > What are your thoughts? My thoughts are: What?! What are you doing, and what are you using? (Are you even using Emacs?) There are two macros: degrees-to-radians radians-to-degrees But this is simple enough for you to rewrite into functions if you prefer that. First thought though, why can't you just get any unit you like by simple arithmetics? -- underground experts united