From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: [Emacs-diffs] master 2667d5c: Add new functions for the root mean square of a (Calc) vector Date: Wed, 16 Sep 2015 09:21:40 -0400 Message-ID: References: <20150916005352.1277.32898@vcs.savannah.gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1442409727 9133 80.91.229.3 (16 Sep 2015 13:22:07 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 16 Sep 2015 13:22:07 +0000 (UTC) Cc: Jay Belanger To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Sep 16 15:22:00 2015 Return-path: Envelope-to: ged-emacs-devel@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 1ZcCem-00058h-Kc for ged-emacs-devel@m.gmane.org; Wed, 16 Sep 2015 15:21:52 +0200 Original-Received: from localhost ([::1]:50779 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZcCem-0008CI-4L for ged-emacs-devel@m.gmane.org; Wed, 16 Sep 2015 09:21:52 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:53048) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZcCej-0007ys-2A for emacs-devel@gnu.org; Wed, 16 Sep 2015 09:21:49 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZcCee-0003X7-4S for emacs-devel@gnu.org; Wed, 16 Sep 2015 09:21:49 -0400 Original-Received: from pruche.dit.umontreal.ca ([132.204.246.22]:54666) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZcCed-0003Wz-VS for emacs-devel@gnu.org; Wed, 16 Sep 2015 09:21:44 -0400 Original-Received: from ceviche.home (lechon.iro.umontreal.ca [132.204.27.242]) by pruche.dit.umontreal.ca (8.14.1/8.14.1) with ESMTP id t8GDLeKK015176; Wed, 16 Sep 2015 09:21:40 -0400 Original-Received: by ceviche.home (Postfix, from userid 20848) id 560E16612A; Wed, 16 Sep 2015 09:21:40 -0400 (EDT) In-Reply-To: (Jay Belanger's message of "Wed, 16 Sep 2015 00:53:52 +0000") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) X-NAI-Spam-Flag: NO X-NAI-Spam-Threshold: 5 X-NAI-Spam-Score: 0 X-NAI-Spam-Rules: 1 Rules triggered RV5431=0 X-NAI-Spam-Version: 2.3.0.9393 : core <5431> : inlines <3806> : streams <1506167> : uri <2041723> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 132.204.246.22 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:190006 Archived-At: -*- mode: nit-pick -*- > +Another commonly used mean, the RMS (root-mean-square), can be computed > +for a vector of numbers by using the @kbd{u R} I must admit that I don't use Calc very often, and read its manual even less often, so clearly I'm taking this out of context, but in any case: To me a "vector" has a rather specific meaning, and taking the root mean square of a vector doesn't make much sense. Instead, I like to take the rms of a *set* of numbers (which may be provided by packaging them in a vector, of course). Stefan