From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.devel Subject: math/stats `new-rating-system' Date: Sun, 14 Jul 2024 20:15:37 +0200 Message-ID: <87cynfet6e.fsf@dataswamp.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="10929"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) To: emacs-devel@gnu.org Cancel-Lock: sha1:QIZQ5Ta5ZBTYHgEBq+emg0lzD/A= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun Jul 14 20:30:45 2024 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 1sT3zg-0002cZ-C7 for ged-emacs-devel@m.gmane-mx.org; Sun, 14 Jul 2024 20:30:44 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sT3zI-00026m-HQ; Sun, 14 Jul 2024 14:30:24 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sT3pN-0008B2-KM for emacs-devel@gnu.org; Sun, 14 Jul 2024 14:20:05 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sT3pL-0004Vt-UJ for emacs-devel@gnu.org; Sun, 14 Jul 2024 14:20:05 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1sT3pJ-000830-S9 for emacs-devel@gnu.org; Sun, 14 Jul 2024 20:20:01 +0200 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: emacs-devel@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=ged-emacs-devel@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Sun, 14 Jul 2024 14:29:59 -0400 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 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-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:321654 Archived-At: Here is a function to transform a score in one system to the corresponding in some other system. Maybe something for a math or stats package in ELPA, if we have one? I don't know if I got the docstring just right. It looks more relaxed in the help system compared to in the source, for sure. (defun new-rating-system (r rw rb w b &optional float) "R is the rating. For example in a 1-5 system a good rating is 4.\n RW and RB are the endpoints of the current system. In a 1-5 system they are 1 and 5.\n W and B are the endpoints of the desired system. If a 1-30 system is desired they are 1 and 30.\n FLOAT is set for a float return instead of the default integer type.\n Example:\n If your rating is 4 out of 5 in the 1-5 system, how much is that in a 1-30 system? Eval this:\n (new-rating-system 4 1 5 1 30)\n Answer: 4 out of 5 corresponds to 22 out of 30." (let ((rating (+ w (* (- r rw) (/ (- b w) (- rb rw) 1.0))))) (if float (format "%.1f" rating) (floor rating) ))) -- underground experts united https://dataswamp.org/~incal