Re: [MORPHMET] model II regression statistics PAST

2016-03-12 Thread Mauro Cavalcanti
Patrick, PAST is "free" as in "free beer", not as in *free speech*. It is gratis, but not open. The problem you have is just typical of such black box approach to scientific software development -- since one cannot see the source code, it is not possible to check how this or that algorithm is

[MORPHMET] Using photographs from distinct sources to GM analyses

2016-03-12 Thread Pablo Fisichella
Dear Morphometricians I am new in geometric morphometrics. I have a question perhaps quite simple with regards to 2D GM. I am comparing the size/shape of human skulls from different sources using photographs taken in norma lateralis. One part was obtained through a standardized protocol while the

Re: [MORPHMET] model II regression statistics PAST

2016-03-12 Thread N. MacLeod
I can’t help you with PAST, but this reference will allow you to compute the correct statistics for a standardized major axis (often erroneously called a reduced major axis) regression. Warton, D. I., et al., 2006, Bivariate line-fitting methods for allometry: Biological Reviews, v. 81, no. 2,