Hello, Martin! Thank you for thinking about!
You got exactly what I try to do. However, there is a difference, indeed: when you code a taxon with missing data, it will be given one of the possible existing states. So, for example, a tailless lizard (just an example! I study erotylid beetles!) would receive the most parsimonious entry of the possible colors coded (say, red and blue). On the other hand, if you use a third state ("no tail"), I believe you would be mixing two different observations (presence of tail and color of tail). That is when this my idea plopped. What do you think?
Gracias y saludos (sorry for the English - I just do not spanish well!)!
You got exactly what I try to do. However, there is a difference, indeed: when you code a taxon with missing data, it will be given one of the possible existing states. So, for example, a tailless lizard (just an example! I study erotylid beetles!) would receive the most parsimonious entry of the possible colors coded (say, red and blue). On the other hand, if you use a third state ("no tail"), I believe you would be mixing two different observations (presence of tail and color of tail). That is when this my idea plopped. What do you think?
Gracias y saludos (sorry for the English - I just do not spanish well!)!
----- Mensagem original ----
De: Martin Ramirez <ramirez@...>
Para: clado@...
Enviadas: Terça-feira, 3 de Julho de 2007 11:02:48
Assunto: Re: Res: [clado] Increasing number of character states in TNT
De: Martin Ramirez <ramirez@...>
Para: clado@...
Enviadas: Terça-feira, 3 de Julho de 2007 11:02:48
Assunto: Re: Res: [clado] Increasing number of character states in TNT
Hola Peterson,
En el caso de los no aditivos, un estado único para un terminal, no te va
a dar exactamente igual que una entrada faltante? No veo la
diferencia.. .
Martin
At 11:33 AM 6/30/2007, you wrote:
Hi there, Pablo! Thanks for the prompt reply! Hope ever'thing is fine with you.
Yes, that is the point. The character is discrete, non-additive. ..
The whole thing has to do with missing data, as a matter of fact. Instead of coding "?" for the color of tail of a tailless lizard (what would end up joining it with either the red-tailed or the blue-tailed) , one could just code a unique state for it, what would set that taxon apart for that character. Now imagine one has more than 32 tailless lizards... There is where my problem lies!
Well, if I come up with something, or even if one (even myself) finds this useless...
Best wishes!!
----- Mensagem original ----
De: "pablogolo@csnat. unt.edu.ar" <pablogolo@csnat. unt.edu.ar>
Para: clado@gruposyahoo. com.ar
Enviadas: Sexta-feira, 29 de Junho de 2007 18:50:53
Assunto: Re: [clado] Increasing number of character states in TNT
Hola Peterson,
no, si el carácter no es aditivo (o lo que es lo mismo, continuo), no hay
manera de tener más de 32 estados. Cada estado es un bit, y TNT es (por
ahora al menos) un programa de 32-bits.
Vas a tener que buscar alguna alternativa. ..
--Pablo Goloboff
Novo Yahoo! Cadê? - Experimente uma nova busca.
Martín J. Ramírez
División Aracnología
Museo Argentino de Ciencias Naturales
Av. Angel Gallardo 470
C1405DJR Buenos Aires
Argentina
tel +54 11 4982-8370 int. 169
fax +54 11 4982-4494
Novo Yahoo! Cadê? - Experimente uma nova busca.
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