From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: jay.p.belanger@gmail.com Newsgroups: gmane.emacs.help Subject: Re: Getting used to Calc's Radian convention Date: Fri, 12 Sep 2014 19:26:08 -0700 (PDT) Message-ID: <26301a71-0d4b-4ac5-bf8a-c1deb3f236bd@googlegroups.com> References: <mailman.8731.1410504469.1147.help-gnu-emacs@gnu.org> <87bnqklkg8.fsf@debian.uxu> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 X-Trace: ger.gmane.org 1410575427 21550 80.91.229.3 (13 Sep 2014 02:30:27 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 13 Sep 2014 02:30:27 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sat Sep 13 04:30:21 2014 Return-path: <help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org> 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 <help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org>) id 1XSd6S-0005qI-RS for geh-help-gnu-emacs@m.gmane.org; Sat, 13 Sep 2014 04:30:20 +0200 Original-Received: from localhost ([::1]:48059 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from <help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org>) id 1XSd6S-0006XA-5c for geh-help-gnu-emacs@m.gmane.org; Fri, 12 Sep 2014 22:30:20 -0400 X-Received: by 10.224.37.6 with SMTP id v6mr6805664qad.9.1410575168767; Fri, 12 Sep 2014 19:26:08 -0700 (PDT) X-Received: by 10.182.29.106 with SMTP id j10mr26044obh.12.1410575168652; Fri, 12 Sep 2014 19:26:08 -0700 (PDT) Original-Path: usenet.stanford.edu!m5no713031qaj.0!news-out.google.com!ef6ni2722igb.0!nntp.google.com!r10no1158260igi.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Original-Newsgroups: gnu.emacs.help In-Reply-To: <87bnqklkg8.fsf@debian.uxu> Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=184.155.90.233; posting-account=PC3UFwoAAAB2fDhTylOvcGZmzmQZ7shl Original-NNTP-Posting-Host: 184.155.90.233 User-Agent: G2/1.0 Injection-Date: Sat, 13 Sep 2014 02:26:08 +0000 Original-Xref: usenet.stanford.edu gnu.emacs.help:207594 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 <help-gnu-emacs.gnu.org> List-Unsubscribe: <https://lists.gnu.org/mailman/options/help-gnu-emacs>, <mailto:help-gnu-emacs-request@gnu.org?subject=unsubscribe> List-Archive: <http://lists.gnu.org/archive/html/help-gnu-emacs> List-Post: <mailto:help-gnu-emacs@gnu.org> List-Help: <mailto:help-gnu-emacs-request@gnu.org?subject=help> List-Subscribe: <https://lists.gnu.org/mailman/listinfo/help-gnu-emacs>, <mailto:help-gnu-emacs-request@gnu.org?subject=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:99868 Archived-At: <http://permalink.gmane.org/gmane.emacs.help/99868> > > 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 > My thoughts are: What?! He's referring to Calc (part of Emacs), which can work with units (such as meters, radians, etc.) Calc doesn't "know" that the rad probably shouldn't be there; perhaps there could be a simple way of telling it.