MESSAGE
| DATE | 2016-09-25 |
| FROM | ruben safir
|
| SUBJECT | Re: [Learn] Cladistics and Computational Math
|
From learn-bounces-at-nylxs.com Sun Sep 25 03:02:46 2016
Return-Path:
X-Original-To: archive-at-mrbrklyn.com
Delivered-To: archive-at-mrbrklyn.com
Received: from www.mrbrklyn.com (www.mrbrklyn.com [96.57.23.82])
by mrbrklyn.com (Postfix) with ESMTP id 117BD163E9A;
Sun, 25 Sep 2016 03:02:46 -0400 (EDT)
X-Original-To: learn-at-nylxs.com
Delivered-To: learn-at-nylxs.com
Received: from [10.0.0.62] (flatbush.mrbrklyn.com [10.0.0.62])
by mrbrklyn.com (Postfix) with ESMTP id BBCA5161469
for ; Sun, 25 Sep 2016 03:02:43 -0400 (EDT)
References:
To: learn-at-nylxs.com
From: ruben safir
Message-ID: <6561b64d-14ad-a5c2-ebca-6b3de183a5f9-at-mrbrklyn.com>
Date: Sun, 25 Sep 2016 03:02:43 -0400
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101
Thunderbird/45.2.0
MIME-Version: 1.0
In-Reply-To:
Subject: Re: [Learn] Cladistics and Computational Math
X-BeenThere: learn-at-nylxs.com
X-Mailman-Version: 2.1.17
Precedence: list
List-Id:
List-Unsubscribe: ,
List-Archive:
List-Post:
List-Help:
List-Subscribe: ,
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Errors-To: learn-bounces-at-nylxs.com
Sender: "Learn"
On 09/24/2016 07:12 PM, John Harshman wrote:
> On 9/24/16 2:21 PM, ruben safir wrote:
>> On 09/24/2016 03:40 PM, John Harshman wrote:
>>>
>>> Depends on what you mean by cladistics. What do you mean? There are
>>> methods used for morphological phylogeny that do not rely on strict
>>> parsimony, though parsimony is still probably the most common.
>>
>> What is the definition of the word parsimony in regards to evolutionary
>> biology. It can't be the economics term I'm used to.
>>
>
> These are the buzzwords you have to learn if you want to deal with
> phylogenetics. Here's a short primer, beginning with a detour.
>
> Phylogenetic analyses act on data sets to produce favored trees. Most
> methods do this by first setting a numerical optimality criterion,
> assessing that criterion for lots and lots of candidate trees, and
> picking the one that's best by that criterion. Parsimony is one such
> criterion. Briefly, a tree's parsimony score is the minimum number of
> character state changes, somewhere on the tree, necessary to explain the
> distribution of all character states in the terminal taxa. Parsimony
> algorithms perform the calculations necessary to determine the parsimony
> score. The lower the score, that is, the fewer the required changes, the
> better.
>
> (Let's leave aside the historical reasons for the name "parsimony". It
> has to do with philosophy of science, specifically Karl Popper.)
From usenet sci.bio.paleontology
_______________________________________________
Learn mailing list
Learn-at-nylxs.com
http://lists.mrbrklyn.com/mailman/listinfo/learn
|
|
