From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Philipp Stephani Newsgroups: gmane.emacs.devel Subject: Re: master 792ba71: Add a new function 'buffer-line-statistics' Date: Tue, 12 Jan 2021 19:29:39 +0100 Message-ID: References: <20210112174748.18372.29339@vcs0.savannah.gnu.org> <20210112174750.5928220B2C@vcs0.savannah.gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="18401"; mail-complaints-to="usenet@ciao.gmane.io" Cc: Lars Ingebrigtsen , Emacs developers To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Jan 12 19:31:49 2021 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kzOSL-0004hK-7T for ged-emacs-devel@m.gmane-mx.org; Tue, 12 Jan 2021 19:31:49 +0100 Original-Received: from localhost ([::1]:41088 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kzOSK-0005oC-8A for ged-emacs-devel@m.gmane-mx.org; Tue, 12 Jan 2021 13:31:48 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:53972) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kzOQT-00046i-7X for emacs-devel@gnu.org; Tue, 12 Jan 2021 13:29:53 -0500 Original-Received: from mail-oo1-xc2b.google.com ([2607:f8b0:4864:20::c2b]:32969) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kzOQR-00057X-Jm for emacs-devel@gnu.org; Tue, 12 Jan 2021 13:29:52 -0500 Original-Received: by mail-oo1-xc2b.google.com with SMTP id k7so823026ooa.0 for ; Tue, 12 Jan 2021 10:29:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=cDNEv+8h4ZBYvrZb+qpWs4Sgmhw64FZwU70wQzpWdvo=; b=eDqY2CPoggklaTmznSVzuBEFz9veZORhk14S+jdCpY2Dyb3VdS56bklHz2Spwoxr64 f1JlFcaZ7qlojD0rMrT3kqt2cUQ52DvVCX+FBYP6/sHnJUsU66k1zcz4oH9SPXpj3YJz DJOTJV+cvlOvuh0DBVhVfWTHomVCF6kAFERB1sCcmlXTzk7qpeGn+kZbfnQgt04YI4wu Y7jE9Ka+hTqXBlrK/3nYr0U72ZhNeanPM8PQXenQf+gL5fKpC1oH9L8vGbbxfhS2Yp3t OyewoTOD5soevWcNjS475Vgto3cTSDJ6zwdYN7zgCIqBDcH81J10P4j6XW99r7FquhBg lj2A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=cDNEv+8h4ZBYvrZb+qpWs4Sgmhw64FZwU70wQzpWdvo=; b=ss6IKyfsSyI0QKTFXRgucTaIo3Sw/4L+MMDtsZdA5XLugl2vKyzJvRUUQP5EPib9OH syYXbtdFmD9HlVNBO7dVTQaNezGGSSU9o2b4SbDVkVV/W9sObE3RJV43zOsdyU5ognmZ wb7zw5c6RibMsJ6DUQJoHPKSgx5N29KNgkSUcMssrYZxDVGOB7LkfH6kWlCIH3sfuyvP f3Idv7bcdITihv7bA7zLyrwr+s6lAazbmJgsBMKeILmpnXVK0cJRGXJLwa8YaMX1VurA oWo3SHfPqvu489chlgx3YvXyjUayGa90+ECxRt7oILfLHnOR1l+VEUd8hYAvIbudpX34 cITg== X-Gm-Message-State: AOAM530RGXLHcg/H/kb+h08Y7iXIKQr/1zsccLvs4mY/y+oF/kjoUZcw SfmDYY8Cntx5U+DkHjhd+sG61DE+OEBL+e+X5Eo= X-Google-Smtp-Source: ABdhPJxwgHtJeKhUEYsHaEMUNVz9cxdtAp3CODC2CHDqwEGjt+YulVoLyb2sD7ABTMz7Fx7iakSe9qE2lU/zcu+7TBY= X-Received: by 2002:a4a:ea5a:: with SMTP id j26mr242688ooe.45.1610476189991; Tue, 12 Jan 2021 10:29:49 -0800 (PST) In-Reply-To: Received-SPF: pass client-ip=2607:f8b0:4864:20::c2b; envelope-from=p.stephani2@gmail.com; helo=mail-oo1-xc2b.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:263017 Archived-At: Am Di., 12. Jan. 2021 um 19:22 Uhr schrieb Stefan Monnier : > > > + double mean = 0; > [...] > > + /* Blame Knuth. */ > > + mean = mean + (this_line - mean) / lines; > > I must admit to not being fully cognizant of Knuth, but doesn't this > compute the average rather than the mean? > > I thought computing the mean was necessarily O(N) in space (like > keeping the full sequence of line lengths so you can sort it and then > pick the middle point). > That's the median. "Mean" typically means "arithmetic mean."